Department of
Physics

I work in Experimental Condensed Matter Physics, specifically in the field of Quantum Optoelectronics. After completing the PhD in semiconductor physics from Tata Institute of Fundamental Research, Mumbai, I continued my postdoctoral tenures in University of Nebraska at Lincoln (2001-2004) and then in University of Oregon before joining IISER Pune in 2008.

Research

Quantum Properties of Excitons and light-matter interactions

Currently we study the physics of excitons (electron-hole pairs) using electrical transport and optical spectroscopies. We are specifically interested in experimental understanding of macroscopic quantum state of excitons. For example - excitonic Bose-Einstein Condensation etc.

Selected Publications

Bhunia, A., Singh, M. K., Huwayz, M. A., Henini, M. and Datta, S. (2021). Tailoring Quantum Oscillations of Excitonic Schrodinger Cats as Qubits [arXiv:2107.13518]

Bhunia, A., Singh, M. K., Gobato, Y. G., Henini, M. and Datta. (2018) Experimental Detection and Control of Trions and Fermi-Edge Singularity in Single-Barrier GaAs/AlAs/GaAs Heterostructures Using Photocapacitance Spectroscopy. Phys. Rev. Applied 10, 044043.

Bhunia, A., Singh, M. K., Gobato, Y. G., Henini, M. and Datta. (2018). Experimental evidences of quantum confined 2D indirect excitons in single barrier GaAs/AlAs/GaAs heterostructure using photocapacitance at room temperature, J. of Applied Physics 123, 044305.

Bhunia, A., Singh, M. K., Alshamari, M. S., Henini, M. and Datta. (2016). Negative activation energy and dielectric signatures of excitons and excitonic Mott transitions in quantum confined laser structures. Journal of Applied Physics 120, 144304.

Bansal, K. and Datta, S. (2013). Temperature dependent reversal of voltage modulated light emission and negative capacitance in AlGaNP based multi quantum well light emitting devices, Appl. Phys. Lett. 102, 053508.

Varghese, A. and Datta, S. (2012). Directionally asymmetric self-assembly of cadmium sulfide nanotubes using porous alumina nanoreactors: Need for chemohydrodynamic instability at the nanoscale, Physical Review E. 85, 056104.

Patil, P. V. and Datta, S. Do we need to revisit the Bohr exciton radius of hot excitons? [arXiv:1105.2205]

Bansal, K. and Datta, S. (2011). Voltage modulated electro-luminescence spectroscopy to understand negative capacitance and the role of sub-bandgap states in light emitting devices, J. Appl. Phys. 110, 114509.

Datta, S., Ghosh, S., and Arora, B. M. (2001). Electroreflectance and Surface photovoltage Spectroscopy of Semiconductor structures using Indium - Tin - Oxide coated glass electrodes '. Review of Scientific Instruments, 72, 177.

Datta, S and Narasimhan, K. L. (1999). Model for optical absorption in porous silicon'. Physical Review B, 60, 8246.