At the heart of condensed matter physics lies the fascinating phenomenon of excitons—bound states of electrons and holes held together by their mutual Coulomb interaction. These excitonic states play a pivotal role in a wide array of material properties and device applications. In the last decade, one of the most significant breakthroughs in materials science has been the development of mechanical exfoliation techniques, which have made it possible to isolate graphene and graphene-like two-dimensional semiconductors.

Our research focuses on a particularly intriguing aspect of this innovation: the creation of two-dimensional gases of strongly bound excitons. These gases are confined within artificial heterostructures of semiconductors and open up new possibilities for exploring the rich physics of light-matter interaction.

One of the exciting directions of our work involves investigating cavity quantum electrodynamics (QED) with two-dimensional materials placed inside optical cavities. This unique system allows us to probe the interaction between light and matter at the quantum level, providing insights into phenomena such as exciton-photon coupling, quantum coherence, and the behavior of strongly correlated excitonic states.
Through our research, we aim to unlock new knowledge that could pave the way for novel quantum technologies and deeper understanding of material properties at the atomic scale.

All Publications

Anisotropic exciton polariton pairs as a platform for PT-symmetric non-Hermitian physics by Chakrabarty D., Dhara A. , Das P. , Ghosh K. , Chaudhuri A. R., Dhara S. Nano Letters 26 4089-4095 (2026)
Room-temperature valley coherence in a polaritonic system by Qiu L., Chakraborty C. , Dhara S. , Vamivakas A. N. Nature Communications 10 1513- (2019)
Continuously tunable Raman polarization in non-Hermitian anisotropic microcavity polaritons by Das P., Chakrabarty D. , Dhara A. , Ghosh K. , Chaudhuri A. R., Dhara S. Physical Review B (Letter) 113 L081404- (2026)
Giant Resonance Raman Scattering via Anisotropic Excitons in ReS2 by Das P., Chakrabarty D. , Gill N. , Dhara S. ACS Photonics 0000-0000 (2025)
Zero-threshold PT-symmetric polariton-Raman laser by Dhara A., Das P. , Chakrabarty D. , Ghosh K. , Chaudhuri A. R., Dhara S. Physical Review B 111 L041408-1- (2025)
A steady state approach for studying valley relaxation using an optical vortex beam by Pattanayak A. K., Das P. , Dhara A. , Chakrabarty D. , Paul S. , Gurnani K. , Brundavanam M. M., Dhara S. Nano Letters 000-000 (2022)
Probing Spin Dynamics of 2D Excitons with Twisted Light by Pattanayak A. K., Das P. , Chakrabarty D. , Dhara A. , Paul S. , Maji S. , Brundavanam M. M., Dhara S. ACS Photonics 00 0000-0000 (2022)
Interfacial anisotropic exciton-polariton manifolds in ReS2 by Chakrabarty D., Dhara A. , Ghosh K. , Pattanayak A. K., Mukherjee S. , Chaudhuri A. R., Dhara S. Optica 8 1488-1494 (2021)
Additional excitonic features and momentum-dark states in ReS2 by Dhara A., Chakrabarty D. , Das P. , Pattanayak A. K., Paul S. , Mukherjee S. , Dhara S. Physical Review B 102 161404- (2020)
Anomalous dispersion of microcavity trion-polaritons by Dhara S., Chakraborty C. , Goodfellow K. M., Qiu L. , O Loughlin T. A., Wicks G. W., Bhattacharjee S. , Vamivakas A. N. Nature Physics 14 130-133 (2018)