Dr. P. Rajesh obtained his B.Sc. in Physics from St. Xavier’s College, Palayamkottai, and his M.Sc. in Physics from the Department of Physics, Manonmaniam Sundaranar University, Tirunelveli. He received his Ph.D. degree in Physics from Anna University, Chennai, in 2011. During his doctoral studies, he worked as a Junior Research Fellow on a project funded by the Department of Science and Technology (DST), Government of India, and subsequently received the Direct Senior Research Fellowship from the Council of Scientific and Industrial Research (CSIR), India.

Dr. Rajesh has published more than 100 research articles in peer-reviewed international journals and presented over 150 papers at national and international conferences. He is a Fellow of the Academy of Sciences, Chennai, and has received travel grants from DST, CSIR, and SSN to present his research papers in international conferences in held in China, Poland, Japan, South Korea, Singapore, and other countries. He has supervised nine Ph.D. scholars to completion, with three research scholars currently pursuing their doctoral studies under his guidance. In addition, he has served as the Principal Investigator for several research projects funded by national funding agencies. He joined SSN College of Engineering in May 2011 and served there as a faculty member until June 2026. Since July 1, 2026, he has been serving as an Associate Professor in the Department of Physics, School of Science and Humanities, Shiv Nadar University Chennai.

Work experience

Experience: 16 yrs (Teaching & Research)

• July 2026 – Present, Associate Professor, Department of Physics, School of Science and Humanities, Shiv Nadar University Chennai, Chennai.
• March 2024 – June 2026, Associate Professor, Department of Physics, SSN College of Engineering, Chennai.
• May 2011 – March 2024, Assistant Professor, Department of Physics, SSN College of Engineering, Chennai.
• July 2005 – April 2007, Guest Lecturer, Department of Physics, Manonmaniam Sundaranar University, Tirunelveli.

Major Research Projects As Principal Investigator

1. Title : Fabrication of homogeneous plastic scintillators by thermal polymerization reaction for fast neutron detection applications
   Funding Agency : Science and Engineering Research Board (SERB)
   Fund Allocated : ₹43.08 lakh
   Project Duration : 2021 – 2024
   Status : Completed

2. Title : Growth of CdMnTe single crystals by Bridgman technique for application in Gamma ray detection
   Funding Agency : Department of Atomic Energy – Board of Research in Nuclear Sciences (DAE-BRNS)
   Fund Allocated : ₹34.00 lakh
   Project Duration : 2020 – 2023
   Status : Completed

3. Title : Growth of optical quality stilbene and Triphenyl derivatives for high energy Neutron Detection
   Funding Agency : Science and Engineering Research Board (SERB)
   Fund Allocated : ₹19.50 lakh
   Project Duration : 2017 – 2020
   Status : Completed

4. Title : Growth of Direction Controlled Homogeneous Mixed Crystals for Optical Applications
   Funding Agency : Council of Scientific & Industrial Research (CSIR)
   Fund Allocated : ₹19.40 lakh
   Project Duration : 2016 – 2019
   Status : Completed
5. Title : Development of High Quality Direction Controlled Lithium Iodate and Lithium Sulphate Single Crystals for Nonlinear Optical Applications

             Funding Agency : Department of Atomic Energy – Science and Engineering       Research Board (DAE-BRNS)
             Fund Allocated : ₹24.00 lakh
             Project Duration : 2013 – 2016
             Status : Completed

Publications

1. Nandhini R. Nagendra Nath, Pavithra K., and Rajesh Paulraj. “Synergistic effects in Co₃O₄/MoS₂/g-C₃N₄ composites for enhanced asymmetric supercapacitor performance.” Journal of Power Sources 689 (2026): 240750. Q1: 8.2.

2. Praveen Joshwa Ramesh, Rajesh Paulraj, Mohit Tyagi; UV and X-ray excited luminescence from m-terphenyl crystals grown by the vertical Bridgman technique. Mater. Chem. C 2026; Q1: 5.2
3. Johnson, Staines Obed James, Rajesh Paulraj, Rachna Selvamani, and Rekha Rao. “Growth and characterization of Cd0. 90Mn0. 10Te1-ySey single crystals: Compositional influence on physical properties.” Materials Science in Semiconductor Processing 206 (2026): 110457, Q1: 4.6.
4. Mohamad Asikali, Anusuya Mary, Rajesh Paulraj, Chinnasami Sidden, and Sabari Girisun T.C. “Interplay of electronic structure and nonlinear absorption in 2-Hydroxybenzamide (2HBA) single crystal.” Journal of Physics and Chemistry of Solids 217 (2026). Q2: 5.9.

5. Pavithra, K., P. Rajesh Paulraj. S. Binathy, D. KaniMozhi, and T. Rajesh Kumar. “Exploring Composition-Driven Synergy in NMO/PANI Composites: A Comprehensive Material and Electrochemical Evaluation for Supercapacitor Applications.” Materials Research Bulletin(2026): 114084, Q1: 5.7.
6. N. Arpita Aparajita, Manivel Rajan, N.R. Sanjay Kumar, V. Srihari, Rajesh Paulraj, and S. Ganesamoorthy. “High pressure X-ray diffraction studies of Cd₁₋ₓMnₓTe (x = 0.05, 0.15).” Materials Chemistry and Physics 361 (2026): 132634. Q1: 4.7.
7. Robinson, Ashega Sherly, Saravanan Subramani, Rajesh Paulraj, and R. Sivakumar. “NiCo2S4/MoS2/MWCNT nanocomposite: A dual-functional catalyst for wastewater treatment and sustainable water splitting applications.” Journal of Water Process Engineering 81 (2026): 109275. IF 6.7
8. Jubi Initha Mary K, Mohamad Asikali A, Rajesh Paulraj, Tailoring piezoelectric and dielectric performance of TGS crystals through polyborate incorporation. Appl. Phys. A 132, 346 (2026).
9. Mohamad Asikali A, Rajesh Paulraj, Sabari Girisun T C, Synthesis and growth of 1-(4-methylphenyl)-3-(4-N, N-dimethylaminophenyl)-2-propen-1-one (DAMC) single crystal via vertical bridgman technique: A study of photoluminescence and third-order nonlinear optical activity, Optical Materials, Volume 162, May 2025, 116830, Q1 : IF 4.
10. Praveen Joshwa Ramesh, Rajesh Paulraj, Investigations on growth, structural, thermal, and THG behavior of double-bonded nitroxy single crystal, Journal of Molecular Structure, Volume 1326 (2025): 141027, Q2: IF 4.0
11. Pavithra, K., P. Rajesh, P. Chithra Lekha, N. Balagowtham, and L. Marini. “Tailored nickel-bismuth phosphate composites via microwave-assisted synthesis for enhanced electrochemical performance in supercapacitors.” Journal of Power Sources 658 (2025): 238301, Q1: I.F 8.2.
12. Johnson, Staines Obed James, Manivel Rajan, and Rajesh Paulraj. “Influence of Mn composition on structural, optical, dielectric and magnetic properties of synthesized Cd 1− x Mn x Te (x= 0.08 & 0.12) polycrystals.” CrystEngComm 26, no. 32 (2024): 4286-4294, Q2: I.F:2.6.
13. Asikali, A. Mohamad, Rajesh Paulraj, Lizbeth Alex, and Kaushik Banarjee. “Vaporized purification and growth of optically transparent Trans-Stilbene for fast neutron detection applications.” Inorganic Chemistry Communications 166 (2024): 112624, Q1, I.F 5.6.
14. Pavithra, K., and Rajesh Paulraj. “Synergetic supercapattery: Stitching of cobalt zinc manganese oxide and polyaniline matrix for efficient energy storage applications.” Journal of Power Sources 608 (2024): 234598. Q1, I.F-9.2.
15. Rajan, Manivel, Rajesh Paulraj, Vijayakumar Palanimuthu, K. Ganesan, Varsha Roy, Edward Prabu Amaladass, R. M. Sarguna, S. Ganesamoorthy, and Ramasamy Perumalsamy. ” Cd0. 90Mn0. 10Te single crystal for γ–Ray detector application: A comprehensive analysis of structural and compositional homogeneity” Materials Science in Semiconductor Processing 180 (2024): 108548. Q1, I.F-4.5.
16. Hakkim, Mohamad Asikali Abdul, Rajesh Paulraj, Rajeev Bhatt, Mohammad Soharab, Chinnasami Sidden, Indranil Bhaumik, and Ramasamy Perumalsamy. “Directional growth of 2-ethylimidazolium d-tartrate crystal along (001) and investigation of optical properties for optical limiting applications.” Optical Materials 152 (2024): 115421. Q1, I.F-4.0
17. Hakkim, Mohamad Asikali Abdul, and Rajesh Paulraj. “Rapid formation of imidazolium glutarate (IMGA) compound and investigation of its single crystal growth by modified vertical Bridgman technique for optical limiting applications.” Journal of Crystal Growth (2024): 127707. Q2, I.F-2.0.
18. Pavithra, K., P. Rajesh, and M. Manikandan. “A comprehensive study of imidazolium hydrogen maleate (IMHM) single crystal: computational and experimental insights for nonlinear optical applications.” Journal of Materials Science: Materials in Electronics 35, no. 12 (2024): 1-13. Q2, I.F-2.8.
19. Alex, Lizbeth, Rajesh Paulraj, Sonu Sonu, and Mohit Tyagi. “A radiation resistant 3HF doped polystyrene based intrinsic plastic scintillator.” In AIP Conference Proceedings, vol. 2995, no. 1. AIP Publishing, 2024.
20. Manikandan, S., P. Krishnan, P. Rajesh, and T. Sundareswaran. “Synthesis, growth, structural, and optical properties of benzotriazolium oxalate dihydrate (BTO) single crystal.” Journal of Materials Science: Materials in Electronics 34, no. 27 (2023): 1855. Q2, I.F-2.8.
21. Rajan, Manivel, Rajesh Paulraj, Vijayakumar Palanimuthu, K. Ganesan, Varsha Roy, Edward Prabu Amaladass, R. M. Sarguna, S. Ganesamoorthy, and Ramasamy Perumalsamy. “Growth of Cd1-xMnxTe crystals by vertical Bridgman method and analysis of composition dependence on the bandgap.” Materials Science in Semiconductor Processing 162 (2023): 107484. Q1, I.F-4.1.
22. Gino D. J, Sidden, Chinnasami, Rajesh Paulraj, and S. Ajitha. “Synthesis, crystal structure, spectroscopic, hirshfeld surface, DFT and Z-Scan studies of NLO active 2-methylimidazolium 3-nitrophthalate (2MI3NP) single crystal.” Journal of Materials Science: Materials in Electronics 34, no. 11 (2023): 964. Q2, I.F-2.8.
23. Gino, D. J., Chinnasami Sidden, Rajesh Paulraj, H. Marshan Robert, and S. Ajitha. “Structural, Hirshfeld surface analysis, third order non-linear optical and molecular modelling of imidazolium glutarate single crystals for optical applications.” Journal of Molecular Structure 1276 (2023): 134672. Q2, I.F-3.8.
24. Steephenraj, A., Chinnasami Sidden, Rajesh Paulraj, and S. Sahaya Jude Dhas. “Growth, structural, vibrational, characterization and DFT investigations of 2-methylimidazolium hydrogen oxalate dihydrate (2MIO) single crystal-towards third order NLO applications.” Journal of Molecular Structure 1275 (2023): 134665. Q2, I.F-3.8.
25. Alex, Lizbeth, Rajesh Paulraj, Sonu, and Mohit Tyagi. “Green emitting plastic scintillator with neutron/gamma pulse shape discrimination for fast neutron detection.” Journal of Materials Science: Materials in Electronics 34, no. 7 (2023): 576. Q2, I.F-2.8.
26. Alex, Lizbeth, Rajesh Paulraj, and Mohit Tyagi. “Effect of fluorescent dyes on the scintillation efficiency, improved light yield and radiation hardness of polystyrene-based plastic scintillator: a comparative study.” Radiation Effects and Defects in Solids (2023): 1-18. Q4, I.F-1.0
27. Sidden, Chinnasami, Rajesh Paulraj, Pounraj Parvonraja, and Manikandan Murugesan. “Investigation of the structural, Hirshfeld surface, Z-scan, and molecular modelling of imidazolium fumarate for third harmonic generation applications.” Journal of Molecular Structure 1271 (2023): 134047. Q2, I.F-3.8.
28. Alex, Lizbeth, Rajesh Paulraj, Sonu, and Mohit Tyagi. “Development of large size fast timing and radiation resistant PVT-based plastic scintillator detector.” Journal of Materials Science: Materials in Electronics 34, no. 2 (2023): 127. Q2, I.F-2.8.
29. Sidden, Chinnasami, Rajesh Paulraj, Rajeev Bhatt, Indranil Bhaumik, Mohammad Soharab, and Ramasamy Perumalsamy. “Direction dependent crystalline perfection, Z-scan studies and fabrication of Type-I and Type-II SHG elements using imidazolium L-tartrate crystals for optical modulator applications.” Journal of Physics and Chemistry of Solids 172 (2023): 111065. Q2, I.F-4.0.
30. Lizbeth Alex , Rajesh Paulraj, Mohit Tyagi, (2022),  Effect of PPO and POPOP activators on the scintillation performance of polystyrene-based scintillator, Journal of Optoelectronics and Advanced Materials, Vol. 24, pp. 365 – 371. Q4, I.F-0.5.
31. D. J. Gino1, Chinnasami Sidden, Rajesh Paulraj, S. Ajitha, and H. H. Somaily, (2022),  Investigation on the crystal growth, physicochemical, quantum chemical, and third harmonic generation properties of diisopropylammonium hydrogen phthalate single crystal, J Mater Sci: Mater Electron, Vol. 33 pp.16923–16941. Q2, I.F-2.8.
32. A. Steephen Raj, S. Chinnasami & Rajesh Paulraj, (2022), Investigation on the growth, structural, vibrational, SHG behaviour and DFT studies of imidazolium hydrogen succinate single crystal, Chemical Papers, vol. 76, pp. 5429–5446. Q2, I.F-2.2.
33. Murugesan, Manikandan, Chinnasami Sidden, and Rajesh Paulraj. “Growth, optical and thermal properties of triphenylamine single crystal grown by modified Vertical Bridgman method for optical application.” Solid State Sciences 132 (2022): 106991. Q2, I.F-3.5.
34. C Sidden, R Paulraj, P Parvonraja, M Murugesan, Investigation of the Structural, Hirshfeld Surface, Z-Scan, and Molecular Modelling of Imidazolium Fumarate for Third Harmonic Generation Applications, Journal of Molecular Structure, 2022. Q2, I.F-3.8.
35. MA Abdul Hakkim, R Paulraj, C Sidden, R Perumalsamy, Study of the Crystalline Perfection, Homogeneity, Chemical Etching on the Surface, and Third‐Order Nonlinear Optical Properties of (1 1 0) Oriented Hydroxyethylammonium D‐Tartrate Monohydrate Single Crystal and Hirshfeld Surface Analysis, Crystal Research and Technology, 2200113, 2022. Q3, I.F-1.5.
36. Chinnasami, S., Rajesh Paulraj, and P. Ramasamy. “Bulk crystal growth, spectroscopic, hirshfeld surface analysis, physicochemical and quantum chemical investigations on 2-ethylimidazolium d-tartrate single crystal.” Journal of Molecular Structure 1238 (2021): 130448. Q2, I.F-3.8.
37. Chandran, Senthilkumar, G. John James, and P. Rajesh. “Optical, dielectric, laser damage threshold, dielectric and chemical etching properties of Co2+-doped sodium acid phthalate hemihydrate single crystal.” Journal of Materials Science: Materials in Electronics (2021): 1-12. Q2, I.F-2.8.
38. Chinnasami, S., P. Rajesh, R. Bhatt, Indranil Bhaumik, P. Ramasamy, and A. K. Karnal. “Temperature Dependent Refractive Index, Thermo-optic Coefficient and Birefringence of Negative Biaxial Imidazolium L-Tartrate Non-linear Optical Crystal.” Optik (2021): 167021. Q2, I.F-3.1.
39. Chinnasami, S., Rajesh Paulraj, and P. Ramasamy. “Investigation on the Bulk Crystal Growth, Crystalline Perfection, Refractive Index and Piezoelectric Properties of Borate Single Crystals for Piezoelectric and Electro-Optic Applications.” Chinese Journal of Physics (2021). Q2, I.F-5.0.
40. Murugesan, Manikandan, Rajesh Paulraj, Mohit Tyagi, and Ramasamy Perumalsamy. “< 100> directed growth, Hirshfeld surface analysis, and scintillation properties of trans-Stilbene (TSB) single crystal grown by modified low-temperature vertical Bridgman method.” Journal of Materials Science: Materials in Electronics (2021): 1-11. Q2, I.F-2.8.
41. Murugesan, Manikandan, Rajesh Paulraj, and Ramasamy Perumalsamy. “Growth of 1, 3, 5-Triphenylbenzene single crystal by modified vertical Bridgman method and its characterization for scintillation application.” Journal of Luminescence 230 (2021): 117699. Q2, I.F-3.6.
42. Rajesh, P., P. Adityakrisnakumar, S. Gauthamkumar, S. Chinnasami, and P. Ramasamy. “Growth, structural, optical, piezoelectric and birefringence properties of KAB5 mixed crystal.” In AIP Conference Proceedings, vol. 2265, no. 1, p. 030406. AIP Publishing LLC, 2020.
43. Chinnasami, S., Rajesh Paulraj, Rajeev Bhatt, Indranil Bhaumik, P. Ramasamy, and A. K. Karnal. “Investigation on the growth rate, crystalline perfection, refractive index, Z-scan and electrical characteristics of Z-cut imidazolium l-tartrate single crystal.” Optical Materials 108 (2020): 110380. Q1, I.F-3.9.
44. Chinnasami, S., P. Rajesh, R. Bhatt, Indranil Bhaumik, P. Ramasamy, and A. K. Karnal. “Effect of xylenol orange on the crystalline perfection, optical, piezoelectric and NLO behavior of unidirectionally grown imidazolium L-Tartrate single crystal.” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 67 (2020): 135-146. Q2, I.F-5.0.
45. Iyappan, G., P. Rajesh, and P. Ramasamy. “Investigation on nucleation kinetics, crystal growth, structural, optical, dielectric and SHG behaviour of ADP: KDP (85: 15) mixed crystal grown using seed rotation method for nonlinear optical applications.” Optoelectronics and Advanced Materials-Rapid Communications 14, no. May-June 2020 (2020): 261-267. Q-4, I.F-0.5.
46. Murugesan, Manikandan, Rajesh Paulraj, Ramasamy Perumalsamy, and Maurya Kamlesh Kumar. “Growth, photoluminescence, lifetime, and laser damage threshold studies of 1, 3, 5-triphenylbenzene (TPB) single crystal for scintillation application.” Applied Physics A 126 (2020): 1-9. Q2, I.F-2.7.
47. S Chandran, R Paulraj, P Ramasamy, M Magesh, Crystal growth, vibrational, Hirshfeld surface, thermal, optical, and etching analyses of lithium hydrogen phthalate dehydrate, Journal of Materials Science: Materials in Electronics, 2020, 31 (4), 3706-3714. Q2, I.F-2.8.
48. M Manikandan, P Rajesh, P Ramasamy, Crystal growth, structural, optical, vibrational analysis, Hirshfeld surface and quantum chemical calculations of 1, 3, 5 triphenylbenzene single crystal, Journal of Molecular Structure 2019, 1195, 659-669. Q2, I.F-3.8.
49. P Rajesh, R Perumalsamy, KK Maurya, S Venugopal Rao, An investigation on the growth and propitiates of KDP admixtured ADP single crystals, Ferroelectrics, 2019, 550 (1), 151-172. Q4, I.F-0.8.
50. S Chandran, R Paulraj, P Ramasamy, Crystal growth, dielectric and fluorescence properties of semi-organic lithium hydrogen phthalate dihydrate single crystal, AIP Conference Proceedings, 2019, 2115 (1), 030401.
51. S Chinnasami, S Chandran, R Paulraj, P Ramasamy, Growth, structural, optical and ferroelectric properties of L-proline doped sodium acid phthalate hemihydrate single crystals, AIP Conference Proceedings 2019, 2115 (1), 030399.
52. G Iyappan, P Rajesh, P Ramasamy, Nucleation kinetics, optical, dielectric, piezoelectric and NLO properties of KADP (85: 15) mixed crystals, Optoelectronics and Advanced Materials-Rapid Communications 2019, 13, 217-223. Q-4, I.F-0.5.
53. S. Chinnasami, M. Manikandan, Senthilkumar Chandran, Rajesh Paulraj, P. Ramasamy, Growth, Hirshfeld surfaces, spectral, quantum chemical calculations, photoconductivity and chemical etching analyses of nonlinear optical p-toluidine p-toluenesulfonate single crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 206, 5 January 2019, Pages 340-349. Q2, I.F-4.4.
54. S. Chinnasami, Senthilkumar Chandran, Rajesh Paulraj, P. Ramasamy, Structural, vibrational, Hirshfeld surfaces and optical studies of nonlinear optical organic Imidazolium L-tartrate single crystal, Journal of Molecular Structure, Volume 1179, 5 March 2019, Pages 506-513. Q2, I.F-3.8.
55. Thilagavathy, S. R., P. Rajesh, P. Ramasamy, G. Bhagavannarayana, and K. Ambujam. “Investigations on the growth, structural, optical, mechanical, dielectric and SHG behaviour of GPMG crystals.” Materials Research Innovations 22, no. 3 (2018): 115-120. Q3, I.F-2.3.
56. Babu Rao, G., P. Rajesh, and P. Ramasamy. “Effect of amaranth dye on the growth and properties of conventional and SR method grown KAP single crystals.” In Dae Solid State Physics Symposium 2017, vol. 1942, no. 1, p. 100007. 2018.
57. Aparna, S., N. Elakhya, Gayatri Gopal, P. Rajesh, and P. Ramasamy. “Influence of polyaniline in polyaniline-tin oxide nanocomposite as counter electrode for dye sensitized solar cells.” Optik 157 (2018): 1219-1226. Q2, I.F-3.1.
58. Chandran, Senthilkumar, Rajesh Paulraj, and P. Ramasamy. “Crystal growth, structural, optical, thermal and dielectric properties of lithium hydrogen oxalate monohydrate single crystal.” Optical Materials 73 (2017): 154-162. Q1, I.F-3.9.
59. Chandran, Senthilkumar, Rajesh Paulraj, P. Ramasamy, and K. K. Maurya. “Determination of nucleation kinetics and crystal perfection, optical, piezoelectric properties of semi-organic NLO single crystal-sodium acid phthalate hemihydrate.” Journal of Inorganic and Organometallic Polymers and Materials 27 (2017): 1383-1390. Q2, I.F-4.0.
60. Elakhya, N., G. Gayatri, S. Aparna, P. Rajesh, and P. Ramasamy. “Effect of tin oxide crystallite size on the efficacy of polyaniline-tin oxide nanocomposite based counter electrode for DSSC applications.” Optik 142 (2017): 436-445. Q-1, I.F-3.1.
61. Silambarasan, A., P. Rajesh, P. Ramasamy, A. K. Karnal, Rajeev Bhatt, Indranil Bhaumik, and P. K. Gupta. “Investigation on the bulk growth of α-LiIO 3 single crystals and the influence of pH on its structural, morphological and optical characteristics.” Bulletin of Materials Science 40, no. 4 (2017): 783-789. Q3, I.F-1.8.
62. Chandran, Senthilkumar, Rajesh Paulraj, and P. Ramasamy. “Nucleation kinetics, crystal growth and optical studies on lithium hydrogen oxalate monohydrate single crystal.” Journal of Crystal Growth 468 (2017): 68-72. Q2, I.F-1.8.
63. Rao, G. Babu, P. Rajesh, and P. Ramasamy. “Enhanced optical, thermal and piezoelectric behavior in dye doped potassium acid phthalate (KAP) single crystal.” Journal of Crystal Growth 468 (2017): 411-415. Q2, I.F-1.8.
64. Silambarasan, A., P. Rajesh, and P. Ramasamy. “Growth kinetics and bulk growth of inversely soluble lithium sulfate monohydrate single crystals and their characterization.” Journal of Crystal Growth 468 (2017): 38-42. Q2, I.F-1.8.
65. Rajesh, P., G. Babu Rao, and P. Ramasamy. “Effect of Rochelle salt on growth, optical, photoluminescence, photoconductive and piezoelectric properties of the triglycine sulphate single crystal.” Journal of Crystal Growth 468 (2017): 340-344. Q2, I.F-1.8.
66. Chandran, Senthilkumar, Rajesh Paulraj, and P. Ramasamy. “Crystal growth, piezoelectric, non-linear optical and mechanical properties of lithium hydrogen oxalate monohydrate single crystal.” In AIP Conference Proceedings, vol. 1832, no. 1. AIP Publishing, 2017.
67. Silambarasan, A., P. Rajesh, P. Ramasamy, A. K. Karnal, Rajeev Bhatt, Indranil Bhaumik, and P. K. Gupta. “An investigation to overcome the problems in growing bulk size α-LiIO3 single crystals.” In AIP Conference Proceedings, vol. 1832, no. 1. AIP Publishing, 2017.
68. Nirmal Prashanth, M., Rajesh Paulraj, and Ramasamy Perumalsamy. “Sintering Effect on Tin Oxide Electrode for Supercapacitor Applications.” In Dae Solid State Physics Symposium 2016, vol. 1832, no. 1, p. 050063. 2017.
69. Chandran, Senthilkumar, Rajesh Paulraj, and P. Ramasamy. “Effect of amaranth on dielectric, thermal and optical properties of KDP single crystal.” Materials Chemistry and Physics 186 (2017): 365-371. Q1, I.F-4.1.
70. Silambarasan, A., P. Rajesh, U. Madhusoodanan, and P. Ramasamy. “Investigation on the solubility, crystal growth, optical, laser damage threshold, NLO, photoluminescence and dielectric properties of pure and cadmium (Cd2+)-doped lithium sulfate monohydrate single crystals.” Materials Research Innovations 21, no. 1 (2017): 27-32. Q3, I.F-2.1.
71. Silambarasan, A., P. Rajesh, Rajeev Bhatt, Indranil Bhaumik, K. K. Maurya, A. K. Karnal, P. Ramasamy, and P. K. Gupta. “Investigation on the structural, linear/nonlinear optical and electrical characteristics of Cd-and Mn-doped polar lithium sulfate monohydrate crystals.” New Journal of Chemistry 41, no. 20 (2017): 12259-12267. Q2, I.F-3.3
72. Silambarasan, A., P. Rajesh, Rajeev Bhatt, Indranil Bhaumik, A. K. Karnal, P. Ramasamy, and P. K. Gupta. “Investigation on crystalline perfection, optical transmittance, birefringence, temperature-dependent refractive index, laser damage threshold and pyroelectric characteristics of inversely soluble lithium sulfate monohydrate single crystals.” Applied Physics A 122 (2016): 1-9. Q2, I.F-2.7.
73. Manikandan, S., R. Mahalakshmi, P. Krishnan, F. Yogam, and P. Rajesh. “Growth, structural, optical, thermal and dielectric properties of l-asparagine monohydrate admixtured l-thiomalic acid single crystal.” Optik 127, no. 13 (2016): 5316-5321. Q2, I.F-3.1.
74. Rao, G. Babu, P. Rajesh, and P. Ramasamy. “Unidirectional growth of non-linear optical triglycine calcium dibromide single crystal by a Sankaranaryanan–Ramasamy method.” Journal of Crystal Growth 440 (2016): 47-54. Q2, I.F-1.8.
75. Rao, G. Babu, P. Rajesh, and P. Ramasamy. “Investigations on the growth, optical, thermal, dielectric, and laser damage threshold properties of crystal violet dye-doped potassium acid phthalate single crystal.” Applied Physics A 122 (2016): 1-8. Q2, I.F-2.7.
76. Chandran, SenthilKumar, Rajesh Paulraj, and P. Ramasamy. “Structural, optical, thermal, photoconductivity, laser damage threshold and fluorescence analysis of an organic material: β-P-amino benzoic acid single crystal.” Optical Materials 52 (2016): 49-55. Q1, I.F-3.9
77. Silambarasan, A., E. Nageswara Rao, S. Venugopal Rao, P. Rajesh, and P. Ramasamy. “Bulk growth, crystalline perfection and optical characteristics of inversely soluble lithium sulfate monohydrate single crystals grown by the conventional solvent evaporation and modified Sankaranarayanan–Ramasamy method.” CrystEngComm 18, no. 12 (2016): 2072-2080. Q2, I.F-3.1.
78. Senthilkumar Chandran, Rajesh Paulraj, P. Ramasamy, Crystal growth, spectral, optical, laser damage, photoconductivity and dielectric properties of semi organic L-cystine hydrochloride single crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 151, Pages 432-437, 2015. Q2, I.F-4.4.
79. Senthilkumar Chandran, R. Jagan, Rajesh Paulraj, P. Ramasamy, Spectral, mechanical, thermal, optical and solid state parameters, of metal-organic bis(hydrogenmaleate)-CO(II) tetrahydrate crystal, Journals of solid state chemistry, Volume 230, Pages 135 -142, 2015. Q2, I.F-3.3.
80. A. Silambarasan, P. Rajesh, P. Ramasamy, Nucleation kinetics and growth aspects of negative solubility lithium sulphate monohydrate single crystal Journal of Crystal Growth, Volume 409, Pages 95-99, 2015. Q2, I.F-1.8.
81. A. Silambarasan, P. Rajesh, P. Ramasamy , Study on structural, morphological, optical and thermal properties of guanidine carbonate doped nickel sulfate hexahydrate crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume134, Pages345-349,2015. Q2, I.F-4.4.
82. P. Rajesh, P. Ramasamy Growth and characterization of large size ADP single crystals and the effect of glycine on their growth and properties, Optical Materials, Volume42, Pages87-93,2015. Q1, I.F-3.9.
83. Purusothaman, R., P. Rajesh, and P. Ramasamy. “Growth and characterization of organic NLO material: Clobetasol propionate.” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 145 (2015): 235-238. Q2, I.F-4.4.
84. Senthilkumar Chandran, Rajesh Paulraj, P. Ramasamy, Influence of amaranth dye on the growth and properties of KDP single crystal, Materials Research Bulletin, Volume 68, Pages 210-215, 2015. Q1, I.F-5.4.
85. A Silambarasan, P Rajesh, P Ramasamy , Growth of high quality bulk size single crystals of inverted solubility lithium sulphate monohydrate, AIP Conference proceedings Volume 1665, Page 100012 -100013, 2015.
86. P. Rajesh, A. Silambarasan, P. Ramasamy,  Effect of crystal violet dye on the optical, dielectric, thermal and mechanical properties of <0 0 1> directed KDP single crystal, Materials Research Bulletin, Volume 49, Pages 640-644, 2014. Q1, I.F-5.4.
87. G. Babu Rao, P. Rajesh, P. Ramasamy, A study on the growth, optical, thermal, mechanical, dielectric and piezoelectric properties of dye doped KAP single crystals Materials Research Bulletin, Volume60, Pages709-713,2014.  Q1, I.F-5.4.
88. P. Rajesh, Urit Charoen In, Prapun Manyum, P. Ramasamy, Effect of the purity of starting materials on the growth and properties of potassium dihydrogen phosphate single crystals – A comparative study, Materials Research Bulletin, Volume 59,  Pages431-434,2014. Q1, I.F-5.4.
89. A. Silambarasan, P. Rajesh, P. Ramasamy Synthesis, growth, structural, optical and thermal properties of an organic single crystal: 4-Nitroaniline 4-aminobenzoic acid , Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 118,  Pages24-27,2014. Q2, I.F-4.4.
90. Thilagavathy, S. R., P. Rajesh, P. Ramasamy, and K. Ambujam. “Growth and characterization of pure and doped KHP NLO single crystals.” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 127 (2014): 248-255. Q2, I.F-4.4.
91. S.R. Thilagavathy,P. Rajesh, P. Ramasamy, K. Ambujam, A study on Fourier transform infrared spectroscopy, thermal, mechanical, NLO and laser damage properties on unidirectional Glycinium Picrate Mono Glycine crystal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 115,  Pages 747-752,2013. Q2, I.F-4.4.
92. P. Rajesh, P. Ramasamy, G. Bhagavannarayana  Growth of ADP–KDP mixed crystal and its optical, mechanical, dielectric, piezoelectric and laser damage threshold studies, Journal of Crystal Growth, Volume 362,  Pages 338-342,2013. Q2, I.F-1.8.
93. K. Boopathi, P. Rajesh, P. Ramasamy, Prapun Manyum Comparative studies of glycine added potassium dihydrogen phosphate single crystals grown by conventional and Sankaranaryanan–Ramasamy methods, Optical Materials, Volume 35,  Pages 954-961,2013. Q1, I.F-3.9.
94. K. Boopathi, P. Rajesh, and P. Ramasamy , Unidirectional growth of potassium hydrogen malate single crystals and its characterizations on optical, mechanical, dielectric, laser damage threshold studies, AIP Conference proceedings Volume 1512, Page 874-875, 2013.
95. P Rajesh, P Ramasamy, Development of high quality, direction controlled ADP single crystals and the effect of impurities on their growth , AIP Conference proceedings Volume 1512, Page 868-869, 2013.
96. K. Boopathi, P. Rajesh, P. Ramasamy ,Growth of negative solubility lithium sulfate monohydrate crystal by slow evaporation and Sankaranarayanan–Ramasamy method Journal of Crystal Growth, Volume 345, Pages 1-6,2012. Q2, I.F-1.8.
97. K. Boopathi,P. Rajesh, P. Ramasamy Investigation on growth, structural, optical, thermal, dielectric and mechanical properties of organic l-prolinium trichloroacetate single crystals, Materials Research Bulletin, Volume 47, Pages 2299-2305,2012. Q1, I.F-5.4.
98. K. Boopathi, P. Rajesh, and P. Ramasamy A study on crystalline perfection, optical, dielectric, mechanical, laser damage threshold and NLO properties of glycine added potassium dihydrogen phosphate single crystals, AIP Conference proceedings Volume 1447, Page 511-512, 2012.
99. P. Rajesh, S. Sreedhar, K. Boopathi, S. Venugopal Rao, P. Ramasamy, Enhancement of the crystalline perfection of <0 0 1> directed KDP single crystal. Current Applied Physics, Volume 11, Pages 1343-1348, 2011. Q2, I.F-2.4.
100. P. Rajesh, K. Boopathi, P. Ramasam  Investigations on the solubility, growth, structural, optical, mechanical, dielectric and SHG behaviour of ammonium acetate doped ammonium dihydrogen phosphate crystals  Journal of Crystal Growth, Volume 318, Pages 751-756, 2011. Q2, I.F-1.8.
101. Rajesh, P., Ramasamy, P., Bhagavannarayana, G. and Kumar, B. “Growth of <1 0 0> directed ADP crystal with slotted ampoule”, Current Applied Physics, Vol. 10, pages. 1221-1226, 2010. Q2, I.F-2.4.
102. Rajesh, P., P. Ramasamy, Binay Kumar, and G. Bhagavannarayana. “Effect of cobalt and dl-malic acid on the growth rate, crystalline perfection, optical, mechanical, dielectric, piezoelectric properties and SHG efficiency of ADP single crystals.” Physica B: Condensed Matter 405, no. 10 (2010): 2401-2406. Q2, I.F-2.8.
103. Rajesh, P., Ramasamy, P. and Mahadevan, C. K. “Effect of Ni2+ on the structural, optical, thermal and dielectric properties of ADP Single crystals”, Materials Letters, Volume. 64, pages. 1140-1143, 2010. Q2, I.F-3.0.
104. Rajesh, P. and Ramasamy, P. “Influence of NH4Cl on the <1 0 0> directed growth and properties of ADP crystal”, Materials Letters,
     Volume. 64, pages. 798-801, 2010. Q2, I.F-3.0.
105. Rajesh, P. and Ramasamy, P.  “Comparative study on L-asparagine monohydrate doped ADP crystals”, Physica B: Physics of Condensed Matter, Volume. 405, pages. 1287-1293, 2010. Q2, I.F-2.8.
106. Bhagavannarayana, G., P. Rajesh, and P. Ramasamy. “Interesting growth features in potassium dihydrogen phosphate: unravelling the origin and dynamics of point defects in single crystals.” Journal of Applied Crystallography 43, no. 6 (2010): 1372-1376. Q1, I.F-6.1.
107. Rajesh, P. and Ramasamy, P.  “A study on optical, thermal, mechanical, dielectric, piezoelectric and NLO properties of unidirectional ammonium chloride added ammonium dihydrogen phosphate crystal”, Materials Letters, Volume. 63, pages. 2260-2262, 2009. Q2, I.F-3.0.
108. Rajesh, P., Ramasamy P. and Bhagavannarayana, G. “Effect of ammonium malate on growth rate, crystalline perfection, structural, optical, thermal, mechanical, dielectric and NLO behaviour of ammonium dihydrogen phosphate crystals”, Journal of Crystal Growth, Volume. 311, pages. 4069-4075, 2009. Q2, I.F-1.8.
109. Rajesh, P. and Ramasamy, P.  “Optical, dielectric and microhardness studies on <1 0 0> directed ADP crystal”, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume. 74, pages. 210-213, 2009. Q2, I.F-4.4.
110. Rajesh, P. and Ramasamy, P. “Growth of dl-malic acid-doped ammonium dihydrogen phosphate crystal and its characterization”, Journal of Crystal Growth, Volume. 311, pages. 3491-3497, 2009. Q2, I.F-1.8.
111. Rajesh, P. and Ramasamy, P.  “Effect of oxalic acid on the optical, thermal, dielectric and mechanical behaviour of ADP crystals”, Physica B: Condensed Matter, Volume. 404, pages. 1611-1616, 2009. Q2, I.F-2.8.
112. Rajesh, P., Ramasamy, P. and Mahadevan, C. K. “Effect of l-lysine monohydrochloride dihydrate on the growth and properties of ammonium dihydrogen orthophosphate single crystals”, Journal of Crystal Growth, Volume. 311, pages. 1156-1160, 2009. Q2, I.F-1.8.

1. Patent Filed and Published

1. 1. Title: Automated Variable-Pitch Helical Coil Winder for Tubular Furnace

             Inventors: Staines Obed James Johnson, Rajesh Paulraj

             Publication date: 01/10/2025

            Patent office: IN

            Patent number: 202441104196

             Application number: 202441104196

2. 2. Title: Dual Mode Bridgman-Traveling Heater Method Assembly

             Inventors: Staines Obed James Johnson, Rajesh Paulraj

             Publication date: 26/09/2025

            Patent office: IN

            Patent number: 202541083197

            Application number: 202541083197

2. List of Book Chapter

1. Praveen Joshwa Ramesh, Rajesh Paulraj “Organic Crystal Scintillators for Fast Neutron Detection and Imaging Applications”. Royal Book Publishing, 2026.
2. Prithiviraj Palanivelu, Shivashankar P, Ajay Kumar M, Rajesh Paulraj, Staines Obed James Johnson “Structural and Optical Characterization of Bridgman-Grown CdTe Single Crystals for Optoelectronic Applications” Xavier Institute for Research and Development Publications, Vol 1 Pg 290, 2025.
3. Rajan, Manivel, Raja Arumugam, Sivasubramani Vediyappan, Siva Vadivel, Rajesh Paulraj, and Ramasamy Perumalsamy. “Nano to Macro Production and Applications of Chalcogenides.” In Structural and Chemical Features of Chalcogenides. IntechOpen, 2024.
4. Plastic Scintillators: Lizbeth Alex, Rajesh, Mohit Tyagi, A Cost-Effective Detector for Radiation Detection and Scintillation Applications in Scintillators in Radiation Detection, Indian Association of Nuclear Chemists and Allied Scientists, (IANCAS)

Awards

• 2025, Elected as a Fellow of the Academy of Sciences, Chennai.
• 2021 ,  Received Best Paper Award: The 65th DAE Solid State Physics Symposium (DAE-SSPS 2021) Organized by the Bhabha Atomic Research Centre (BARC), Mumbai.
• 2017 ,  Awarded the INSA–NASI–IASc Visiting Fellowship at the National Physical Laboratory (NPL), New Delhi.
• 2010 , Received the Senior Research Fellowship (SRF) Award from the Council of Scientific and Industrial Research (CSIR), New Delhi, India.
• 2007 , Awarded the DST Junior Research Fellowship (JRF) for the research project titled “Growth of Large-Size ADP and KDP Single Crystals by the Sankaranarayanan–Ramasamy Method.”

Area of Research

• Semiconductor Materials and Crystal Engineering
• Scintillator Materials for Nuclear and High-Energy Radiation Detection
• Advanced Materials for Sustainable Energy Storage

Links

• Google Scholar : RAJESH PAULRAJ
• ORCHID : PAULRAJ RAJESH -0000-0002-3639-5257
• Scopus Profile: Rajesh Paulraj-25960320500
• Web of Science Researcher ID  : C-5508-2016
• LinkedIn : https://www.linkedin.com/in/dr-paulraj-rajesh-rajesh-p-b0316918/