Faculty Details

Areas of Interest

• Spectroscopic study of semiconductor heterostructures like quantum wells and quantum dots
• Time resolved measurements
• THz spectroscopy
• Optical anisotropy

Current Research

Students

Current PhD Students

• PH14D202    SUBHAMOY SAHOO
• PH18D027    DINESH KUMAR S
• PH19D016    DEVAN C M
• PH19D200    AMINAKUTTY N
• PH18D050    SAROJ POUDYAL (Co-Guidance)

Recent Publications

• Investigation of internal fields in organic semiconductors in the presence of traps. Subhamoy Sahoo, Dhruvajyoti Barah, Rajdeep Dhar, Soumya Dutta, Debdutta Ray, Jayeeta Bhattacharyya. J. Appl. Phys.. 131. 085702. 2022.
• Investigation of 4,4'-bis[(N- carbazole) styryl] biphenyl (BSB4) for a pure blue fluorescent OLED with enhanced efficiency nearing the theoretical limit. Dhruvajyoti Barah, Subhamoy Sahoo, N. S. Manoj Inaganti, H. Kesavan, Jayeeta Bhattacharyya and Debdutta Ray . Semiconductor Science and Technology. 37.
  DOI: 10.1088/1361-6641/ac48db. 2022.
• Spatial Extent of Interaction between Excitons and Polarons in a Bilayer Organic Field-Effect Transistor. Haripriya Kesavan, Subhamoy Sahoo, Sanjoy Jena, Jayeeta Bhattacharyya, and Debdutta Ray. ACS Photonics. 8. 804. 2021.
• Investigation of internal fields in organic semiconductors in the presence of traps. Subhamoy Sahoo, Rajdeep Dhar, Soumya Dutta, and Jayeeta Bhattacharyya. Journal of Applied Physics. 130. 085702.
  DOI: doi.org/10.1063/5.0058515. 2021.
• Charge transfer mediated photoluminescence enhancement in carbon dots embedded in TiO2 nanotube matrix . Anu Babusenan, B.Pandey, Somnath C.Roy, JayeetaBhattacharyya . Carbon. 161. 535.
  DOI: https://doi.org/10.1016/j.carbon.2020.01.097. 2020.
• Enhancing the efficiency of red TADF OLED by optimizing the guest-host matrix and charge balance engineering. Inaganti Naga SaiManoj, Dhruvajyoti Baraha, Subhamoy Sahoo, Jayeeta Bhattacharyya, DebduttaRay. Synthetic Metals. 270. 116599. 2020.
• Optical polarization anisotropy induced by molecular alignment in pentacene films confined in micron sized grooves etched in SiO2 substrate . Anu Babusenan, Sanjoy Jena , Debdutta Ray and Jayeeta Bhattacharyya. Mater. Res. Express . 6 . 046402.
  DOI: https://doi.org/10.1088/2053-1591/aaf911. 2019.
• Study of exciton-polaron interaction in pentacene field effect transistors using high sensitive photocurrent measurements . Haripriya Kesavan, Subhamoy Sahoo, Sanjoy Jena, Prashanth Kumar Manda, Amogh Kumar Baranwal, Soumya Dutta, Jayeeta Bhattacharyya and Debdutta Ray . Journal of Applied Physics. 2019.
• Organic field effect transistors (OFETs) of poly(p-phenylenevinylene) fabricated by chemical vapor deposition (CVD) with improved hole mobility. Deepak Bhat, Sanjoy Jena, Anu Babusenan, Jayeeta Bhattacharyya and Debdutta Ray . Synthetic Metals. 2019.
• Investigation of non-linear dependence of exciton recombination efficiency on PCBM concentration in P3HT:PCBM blends . Anu Babusenan, Suman Mondal, Saranya R, Soumya Dutta, Manoj Gopalakrishnan and Jayeeta Bhattacharyya . Mater. Res. Express (2019).
  DOI: http://dx.doi.org/10.1088/2053-1591/ab1daa. 2019.
• Inter-sublevel dynamics in single InAs/GaAs quantum dots induced by strong terahertz excitation . D. Stephan, J. Bhattacharyya, Y. H. Huo, O. G. Schmidt, A. Rastelli, M. Helm and H. Schneider . Appl. Phys. Lett.. 108. 082107.
  DOI: http://dx.doi.org/10.1063/1.4942893. 2016.
• Magnetic control of Coulomb scattering and terahertz transition among excitons . J. Bhattacharyya, S. Zybell, F. Eßer, M. Helm, H. Schneider, L. Schneebeli, C. N. Böttge, B. Breddermann, M. Kira, S. W. Koch, A. M. Andrews, and G. Strasser . Phys. Rev. B. 89 . 125313. 2014.
• Characterizing intra-exciton Coulomb scattering in terahertz excitations . Zybell, S.; Bhattacharyya, J.; Winnerl, S.; Eßer, F.; Helm, M.; Schneider, H.; Schneebeli, L.; Böttge, C. N.; Kira, M.; Koch, S. W.; Andrews, A. M.; Strasser, G. . Applied Physics Letters. 105. 201109.
  DOI: http://dx.doi.org/10.1063/1.4902431. 2014.
• Observation of forbidden exciton transitions mediated by Coulomb interactions in photoexcited GaAs quantum wells . W. D. Rice, J. Kono, S. Zybell, S. Winnerl, J. Bhattacharyya, H. Schneider, M. Helm, B. Ewers, A. Chernikov, M. Koch, S. Chatterjee, G. Khitrova, H. M. Gibbs, L. Schneebeli, B. Breddermann, M. Kira, and S. W. Koch . Phys. Rev. Lett.. 110 . 137404. 2013.
• In-plane interdot carrier transfer in InAs/GaAs quantum dots . J. Bhattacharyya, S. Zybell, S. Winnerl, M. Helm, M. Hopkinson, L. R. Wilson, and H. Schneider . Appl. Phys. Lett. . 100 . 152101 . 2012.
• Simultaneous time and wavelength resolved spectroscopy under two-colour near infrared and terahertz excitation . J. Bhattacharyya, M. Wagner, S. Zybell, S. Winnerl, D. Stehr, M. Helm, and H. Schneider . Rev. Sci. Instrum. . 82 . 103107. 2011.
• Terahertz activated luminescence of trapped carriers in InGaAs/GaAs quantum dots . J. Bhattacharyya, M. Wagner, M. Helm, M. Hopkinson, L. R. Wilson, and H. Schneider . Appl. Phys. Lett. . 97. 031101. 2010.
• Are AlN and GaN substrates useful for the growth of non-polar nitride films for UV emission? The oscillator strength perspective . J. Bhattacharyya, S. Ghosh, and H. T. Grahn . Phys. Stat. Sol. (b). 246 . 1184. 2009.
• Optical polarization properties of interband transitions in strained group-III-nitride alloy films on GaN substrates with nonpolar orientation . J. Bhattacharyya, S. Ghosh, and H. T. Grahn. Appl. Phys. Lett. . 93. 051913. 2008.
• Electroreflectance lineshapes in multilayered semiconductor structures: Influence of the linear electro-optic effect . J. Bhattacharyya, S. Ghosh, B. M. Arora, and T. J. C. Hosea. Phys. Rev. B. 73 . 195312. 2008.

Teaching

• 2017 :  (Jan - May) - PH1020/ Physics II; (Jul - Nov) - PH5040 Electronics
• 2018 :  (Jan - May) - PH1020 Physics II; (Jul - Nov) - PH5110 Optics & Photonics/ PH5060 Physics Lab I (PG)
• 2019 :  (Jan - May) - PH5120 Physics Lab II (PG)/ PH5890 Ultrafast lasers and Applications; (Jul - Nov) - PH5060 Physics Lab I (PG)/ PH5110 Optics & Photonics
• 2020 :  (Jan - May) - EP3500 Summer Training/ PH5890 Ultrafast lasers and Applications; (Jul - Nov) - PH1010 Physics I
• 2021 :  (Jan - May) - PH1020 Physics II; (Jul - Nov) - PH5814 Laser Physics and Applications
• 2022 :  (Jan - May) - PH5813 Principles of Nanophotonics ; (Jul - Nov) - PH5060 Physics Lab I (PG) / PH7090 Foundations in Experiemntal Physics
• 2023 :  (Jan - May) - PH2080 Physics Lab IV / PH5813 Principles of Nanophotonics