IITKGP

Research Areas

  • Quantum Optics
  • Quantum transport in 2D materials
  • Low dimensional semiconductor structures
  • Nanoscale optoelectronics
  • Light-matter interaction

My research is motivated by a broad interest in understanding and controlling the interaction between light and quantum materials. This work aims to uncover the collective phenomena that emerge when photons strongly interact with electronic excitations. Of particular interest is how simple constituents—electrons, excitons, and photons—can hybridize to form new quantum states with properties that transcend those of their individual components.

Atomically thin van der Waals materials provide an exceptional platform for exploring these phenomena. Their strong excitonic effects, reduced dimensionality, and highly tunable optical properties enable access to regimes of light-matter interaction that are difficult to realize in conventional semiconductors. The ability to engineer artificial heterostructures and tailor material anisotropy further expands the opportunities for discovering new quantum and photonic functionalities.

Another major research direction focuses on quantum optoelectronics, where the goal is to harness light-matter interactions in low-dimensional materials for functional devices. This includes the development of electrically driven light sources, photodetectors, and modulators based on excitonic and polaritonic effects in van der Waals heterostructures. By integrating quantum materials with nanoscale photonic architectures, this work seeks to achieve enhanced light emission, strong nonlinear responses, and efficient control of optical signals at the quantum level. These efforts aim to bridge fundamental physics with device-oriented applications, enabling scalable platforms for next-generation optoelectronic and quantum technologies.

The long-term vision is to establish designer light-matter platforms that integrate emerging quantum materials with engineered photonic structures. Such systems offer exciting opportunities to uncover new physical principles while enabling next-generation photonic and quantum technologies, including low-threshold coherent light sources, robust optical information processing, and novel quantum devices based on hybrid quasiparticles.

  • Stark Shift Reveals Stacking-Dependent Dipole Orientations of Excitons in ReS2 by Paul S., Das P. , Chakrabarty D. , Dhara A. , Dhara S. Nano Letters XXXX - (2026)
  • 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)
  • 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)
  • 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)

Principal Investigator

  • Frequency-Tunable Quantum Light Source Using an Optical Microcavity Anusandhan National Research Foundation (ANRF)
  • Frequency-Tunable Quantum Light Source Using an Optical Microcavity Anusandhan National Research Foundation (ANRF)

Ph. D. Students

Afrose Ahmed

Area of Research: Quantum Optoelectronics

Ananya Sarkar

Area of Research: Semiconductor Quantum Optics

Kaushik Biswas

Area of Research: Quantum Optoelectronics

Mrinmoy Das

Area of Research: Quantum Optoelectronics

Saheli Chakrabortty

Area of Research: Quantum Optoelectronics

Shreya Paul

Area of Research: Nanoscale Optoelectronics

Sounak Dhali

Area of Research: Quantum Optoelectronics