... towards excellence in science

An Autonomous Institution, Under the Ministry of Education, Government of India

Kamaraju Natarajan

Associate Professor
Dept: Physical Sciences (DPS)
E-mail: nkamaraju [at]

All Publications:

  1. Mukherjee, Soumya; NM, Anjankumar; Karthikeyan, B and Kamaraju, N. 2023."Investigation of conductivity and shielding efficiency of the free-standing PVA–GO–Ag composite thin films in terahertz regime using time-domain terahertz spectroscopy." Applied Physics A, 129, 1-13
  2. NM, Anjan; Mukherjee, Soumya; Ramesh, Saranya; Mondal, Ayan; Mahalingam, Venkataramanan and Natarajan, Kamaraju. 2022."Photo Excited Ultrafast Dynamics of Free Carriers and Polarons in V2O5 Micro-Particles through Time-resolved Non-Degenerate Pump Probe Spectroscopy." J. Phys. Chem. C, 126, 20535
  3. NM, Anjankumar; Mukherjee, Soumya; Sunny, Anoop; Karthikeyan, B and Kamaraju, N. 2022."Investigation of self-trapped excitonic dynamics in hematite nanoforms through non-degenerate pump–probe transmission spectroscopy." Applied Physics Letters, 121, 202102
  4. Mukherjee, Soumya; Anjan Kumar, N. M; Upadhya, Prashanth and Kamaraju, N.. 2021."A review on numerical methods for thickness determination in terahertz time-domain spectroscopy." Eur. Phys. J. Spec. Top, 230, 107-120
  5. Sarkar, Jit; Menon, Shankar G; Prasad, Neena; Karthikeyan, B and Kamaraju, N.. 2019."Ultrafast Carrier Dynamics of Undoped and Ho3+ Doped ?-Bismuth Oxide Micro-Rods." J. Phys. Chem. C, 123, 10007
  6. Sarkar, Jit; Menon, Shankar G; Madhumitha, C; Karthikeyan, B and Kamaraju, N.. 2018."Ultrafast electron hole plasma dynamics in chemically pristine and Ag-doped ZnO nanorods." Journal of Applied Physics, 124, 243103
  7. Dutta, Moumita; Kamaraju, N.; Betal, Soutik; Prasankumar, Rohit P; Bhalla, Amar S and Guo, Ruyan. 2017."Magnetoelastoelectric coupling in core–shell nanoparticles enabling directional and mode-selective magnetic control of THz beam propagation." Nanoscale, 9, 13052
  8. Yang, Yuanmu; Kamaraju, N.; Campione, Salvatore; Liu, Sheng; Reno, John L; Sinclair, Michael B; Prasankumar, Rohit P and Brener, Igal. 2016."Transient GaAs Plasmonic Metasurfaces at Terahertz Frequencies." ACS Photonics , 4, 15-21
  9. Bowlan, P.; Kamaraju, N.; Yarotski, DA; Taylor, A.J. and Prasankumar, R.P.. 2016."Using terahertz pulses to shed new light on quantum materials." Infrared, Millimeter, and Terahertz waves IEEE, 1, 14770919
  10. Kamaraju, N.; Pan, Wei; Ekenberg, Ulf; Gvozdic, D.M.; Tombete, Stephane Boubanga; Upadhya, Prashanth C; Reno, John L; Taylor, Antonnie Jane and Prasankumar, Rohit Prashanth. 2015."THz Magneto-optical Spectroscopy of two dimensional hole gas." Applied Physics Letters, 106, 4 pages
  11. Shimada, Toru; Kamaraju, N.; Frischkorn, Christian; Wolf, Martin and Kampfrath, Tobias. 2014."Indication of Te segregation in laser-irradiated ZnTe observed by in situ coherent-phonon spectroscopy." Applied Physics Letters, 105, 1-4
  12. Gutin, A.; Muraviev, A.V.; Kamaraju, N.; Shen, X.; Yamaguchi, Y.; Shur, M.S.; But, D.; Dyakonova, N.; Knap, W.; Rudin, S. and Rupper, G.. 2014."Application of Plasma-Wave Detectors for Ultra-Short Pulse Terahertz Radiation." Infrared, Millimeter, and Terahertz waves, 14770919 IRMMW-THz, 14770919
  13. Kamaraju, N.; Rubano, Andrea; Jian, Linke; Saha, Surajit; Venkatesan, T; Notzold, Jan; Campen, R Kramer; Wolf, Martin and Kampfrath, Tobias. 2014."Sub-cycle control of terahertz waveform polarization using all-optically induced transient metamaterials." Nature Light Science and Applications, 3, 1-5
  14. Kumar, Sunil; Kamaraju, N.; Vasu, K.S. and Sood, A.K.. 2011."Femtosecond photo excited carrier dynamics in reduced graphene oxide suspensions and films." International Journal of Nanoscience, 10, 669
  15. Kamaraju, N. and al., et.. 2011."Coherent Phonons in Pyrochlorate titanates A?Ti?O? (A = Dy, Gd and Tb): a phase transition in Dy?Ti?O? at 110K." Phys. Rev. B, 83, 134104
  16. Kamaraju, N.; Kumar, Sunil and Sood, A. K.. 2010."Temperature-dependent chirped coherent phonon dynamics in Bi?Te? using high intensity femtosecond laser pulses." Europhysics Letters, 92, 1-6
  17. Anija, M.; Kumar, Sunil; Kamaraju, N.; Tiwari, Neha and Sood, A. K.. 2010."Ultrafast dynamics of gold nanorods: Tuning between photo-bleaching and photo-induced absorption." International Journal of Nanoscience, 10, 687-691
  18. Kumar, Sunil; Kamaraju, N.; Vasu, K.S.; Nag, Anshuman; Sood, A. K. and Rao, C.N.R.. 2010."Graphene analogue BCN: Femtosecond non-linear optical susceptibitlity and hot carrier dynamics." Chemical Physics Letters, 499, 152-157
  19. Kumar, Sunil; Kamaraju, N.; Morovsky, Alaxander; Loufty, R.O.; Freysz, Eric and Sood, A. K.. 2010."Terahertz Time Domain Spectroscopy to Detect Low?Frequency Vibrations of Double?Walled Carbon Nanotubes." European Journal of Inorganic Chemistry, 2010, 4363-4366
  20. Kumar, Sunil; Kamaraju, N.; Karthikeyan, B.; Tondusson, M.; Freysz, Eric and Sood, A. K.. 2010."Direct observation of low frequency confined acoustic phonons in silver nanoparticles; Terahertz time domain spectroscopy." J. Chem. Phys. , 133, 014502
  21. Kumar, Sunil; Kamaraju, N.; Karthikeyan, B.; Toundusson, M.; Freysz, Eric and Sood, A. K.. 2010."Terahertz spectroscopy of single-walled carbon nanotubes in a polymer film: observation of low-frequency phonons." J. Phys. Chem. C, 114, 12446
  22. Kamaraju, N. and al., et.. 2010."Influence of two phonon absorption induInfluence of two phonon absorption induced free carriers on coherent polarization and phonon generation in ZnTe." Journal of Applied Physics, 107, 103102
  23. Kumar, Sunil; Anija, M; Kamaraju, N.; Vasu, K.S.; Subramaniyan, K.S.; Sood, A.K. and Rao, C.N.R.. 2009."Femtosecond carrier dynamics and saturable absorption in graphene suspensions." Applied physics Letters, 95, 191911
  24. Kamaraju, N.; Kumar, Sunil; Karthikeyan, B; Morovsky, Alaxander; Loufty, R.O. and Sood, A.K.. 2009."Ultrafast electron dynamics and cubic optical nonlinearity of free standing thin film of double walled carbon nanotubes." Applied physics Letters, 93, 091903
  25. Kamaraju, N.; Dabral, Sunilkumar; Karthikeyan, B; Kakade, Bhalachandra; Pillai, Vijayamohan and Sood, A.K.. 2009."Ultrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions." Journal of Nanoscience and Nanotechnology, 9, 5550
  26. Kamaraju, N.; Kumar, Sunil; Kim, Y.A.; Hayashi, T.; Muramatsu, H; Endo, M. and Sood, A. K.. 2009."Double walled carbon nanotubes as ultrafast optical switches." Applied physics Letters, 95, 081106
  27. Kamaraju, N.; Kumar, Sunil; Guha, Shekhar; Krishnamurthy, Srinivasan; Sood, A. K. and Rao, C. N. R. 2007."Large nonlinear absorption and refraction coefficients of carbon nanotubes estimated from femtosecond Z-scan measurements." Applied Physics Letters, 91, 1-3
  28. Ghosh, Shankar; Kamaraju, N.; Seto, M.; Fujimori, A.; Takeda, Y.; Ishiwata, S.; Kawasaki, S.; Azuma, M.; Takano, M. and Sood, A. K.. 2005."Raman scattering in CaFeO3 and La0.33Sr0.67FeO3 across the charge-disproportionation phase transition." Phys. Rev. B, 71, 245110