Arjun K

Experienced researcher with a focus on semiconductor synthesis and material characterization at the National Institute of Technology. Demonstrated expertise in nonlinear optics and device fabrication, with a track record of successful project outcomes. Strong analytical skills and a commitment to advancing technology through innovative research. Ambitious postdoctoral research fellow seeking to deepen knowledge by completing independent research projects. Experienced in using advanced techniques and methods with an in-depth understanding of correct research procedures.

Reading, Cricket, Football, Swimming

• Qualified National Eligibility Test (NET) (UGC, India) -2018
• Qualified Graduate Aptitude Test in Engineering (GATE, Physics) -2019
• Full A+ grades (above 90%) in every subject in the 10th and 12th levels.

• SPIE International society for optics and photonics (NIT Tiruchirappalli) (Worked as Vice president in NIT Tiruchirappalli SPIE student chapter (2023-2024) )
• Active member in OPTICA NIT Tiruchirappalli Student chapter
• National Service Scheme (NSS) volunteer for 2 years- Central Sector Scheme of Government of India.

• Z-scan (10 ns pulsed Qswitched Nd:YAG laser(Quanta Ray, Spectra physics))
• UV-Visible spectroscopy(JASCO V-670)
• Room temperature Spectrofluorometer (Fluoromax-P- Horiba Jobin Yvon)
• Current-voltage (I-V) measurements (Keysight (B2901A), B1500)
• Micro Raman (Horiba Jobin Yvon LabRAM HR)
• Capacitance-Voltage (C-V) measurment (Keysight (Agilent) 4284A)
• SHG (F1X tool from FemtoMetrix, 780 nm Femtosecond laser)
• Thin film making (rf sputtering, spin-coating)

• 1 Arjun K, Balasubramanian Karthikeyan, Role of Pauli blocking for enhancement of SA in MoS2/PEDOT:PSS nanocomposite films, Journal of Applied Physics,134, 203103. Journal of Applied Physics,134, 203103. https://doi.org/10.1063/5.0163588
• 2 Arjun K, Balasubramanian Karthikeyan, MoS2/PEDOT:PSS nanocomposite films for deep UV sensing: Role of the radiation-induced trapping and localization of charges Applied Physics A 129:543. https://doi.org/10.1007/s00339-023-06766-z
• 3 Arjun K, Amaljith C K, Balasubramanian, Karthikeyan, Enhancing SA in an Au-decorated MoS2/PEDOT: PSS nanocomposite through plasmon resonance and Pauli blocking Physical Chemistry Chemical Physics. 26, 9645-9656. https://doi.org/10.1039/D3CP06153A
• 4 Arjun K, Amaljith C K, Balasubramanian, Karthikeyan, Plasmon induced ambipolar photoresponse in Au- decorated MoS2/PEDOT:PSS nanocomposite Journal of Applied Physics.135, 214502. https://doi.org/10.1063/5.0207603 Journal of Applied Physics selected this article as Editor's pick
• 5. Arjun K, Balasubramanian, Karthikeyan Flexible Ultraviolet Photodetector based on flower-like ZnO/PEDOT:PSS nanocomposites Applied Physics A 128,449. https://doi.org/10.1007/s00339-022-05516-x
• 6. Susmitha Balagopalan, Arjun K, Karthikeyan Balasubramanian Raman spectral studies on phonon softening, surface temperature, Fano resonance, and phase change in MoS2 nanoflakes Applied Physics A ,120,309. https://doi.org/10.1007/s00339-023-06590-5
• 7. Swathi V. M, Arjun K, Anju Rajan, Raghu Chatanathodi, Karthikeyan Balasubramanian and Aji A. Anappara Multivalency-Induced Structural Variations in 2D Selenium Nanosheets: Facile solution-phase Synthesis and Optical Properties DOI https://doi.org/10.1039/D4CP01623H
• 8. Yadhu Balakrishna , Janani Archana K, ARJUN K and Karthikeyan Balasubramanian- Assessing hidden corrosion in AZ91 magnesium alloy via infrared thermography in simulated atmospheric acid rain conditions DOI: 10.1088/2631-8695/ad8067
• 9.Karthikeyan Balasubramanian, KM Megha, K Arjun- Synthesis and characterization of MoO3/PEDOT: PSS nanocomposite for flexible photodetector and nonlinear optical applications, Optics & Laser Technology, https://doi.org/10.1016/j.optlastec.2024.112067
• 10. Karthikeyan Balasubramanian, Abhishek Kumar Choudhary, K Arjun, Anjali Sharma- Optical sensing and nonlinear optical properties of Cr-doped MoO3/PEDOT: PSS Nanocomposites, Optical Materials, https://doi.org/10.1016/j.optmat.2024.116268
• 11. Arjun K, Balasubramanian Karthikeyan -Enhanced Saturable Absorption Induced By Pauli Blocking And Radiation-Induced Trapping With Negative Photoresponse In Cr₂O₃/Mos₂/PEDOT:PSS, Journal of Applied Physics, https://doi.org/10.1063/5.0272272
• 12. K Arjun, B Karthikeyan -ZnS/MoS₂/PEDOT: PSS nanocomposite films with enhanced nonlinear optical properties and negative photoresponse for UV photodetectors, Applied Physics A, https://doi.org/10.1007/s00339-025-09107-4
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• B, Karthikeyan, Research supervisor, bkarthik@nitt.edu, National Institute of Technology, Tiruchirappalli, India, Professor, Department of Physics
• A., Sreekanth, Professor, sreekanth@nitt.edu, National Institute of Technology, Tiruchirappalli, India, Department of Chemistry
• Venkadeshkumar, Ramar, Venkadez3737@sjtu.edu.cn, Shanghai Jiao Tong University, Shanghai, China, School of Chemistry and Chemical Engineering