Quantum Light-Matter

University of St Andrews

We are an experimental group at School of Physics and Astronomy) working on strong light-matter interaction, specifically exciton-polaritons.

Recent News

Congratulations to Anindya on his PhD graduation! He played a pivotal role in advancing our research on Rydberg polaritons in micropillar systems. You can read more in his thesis. We wish him luck in his new adventures at Quandela.

1 Jul, 2025 1 min read News

Publication

We’re excited to announce the publication of two collaborative papers advancing our work on hybrid perovskites (read more).

1 Jul, 2025 1 min read News

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Projects

Giant Rydberg polaritons

Strong light-matter coupling of Rydberg excitons in cuprous oxide

Polariton lattices

Interacting lattices of exciton-polariton condensates

Room-temperature polaritons

Room-temperature single polariton nonlinearity in 2-dimensional materials

Recent Publications

Quickly discover relevant content by filtering publications.

Advancing intercalation strategies in layered hybrid perovskites by bringing together synthesis and simulations

Nature Communications (2025)

This work combines computation and synthesis to design and screen intercalated layered hybrid perovskites, identifying new low-bandgap materials with tunable optoelectronic properties for potential photovoltaic applications.

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Lin-Jie Yang, Wenye Xuan, Sara Henda, Shaoyang Wang, Sai Kiran Rajendran, David B. Cordes, David N. Miller, Alexandra M.Z. Slawin, Lethy Krishnan Jagadamma, Hamid Ohadi, Hsin-Yi Tiffany Chen, Matthew S. Dyer, Julia L. Payne

Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities

Light Science and Applications (2025)

Anisotropic halide perovskite microcavities enable room-temperature photonic Rashba-Dresselhaus spin-orbit coupling and synthetic gauge fields, leading to unconventional topological states with non-zero Berry curvature.

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E. Mavrotsoupakis, L. Mouchliadis, J. Cao, M. Chairetis, M. Triantafyllou-Rundell, E. Macropulos, G. Paschos, A. Pantousas, H. Liu, A. Kavokin, H. Ohadi, C. Stoumpos, P. Savvidis

Materials for excitons–polaritons: Exploiting the diversity of semiconductors

MRS Bulletin (2024)

Review paper on new perspectices on materials for exciton-polritons

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J. Bellessa, J. Bloch, E. Deleporte, V. M. Menon, H. S. Nguyen, H. Ohadi, S. Ravet, T. Boulier

Local tuning of Rydberg exciton energies in nanofabricated Cu2O pillars

Communications Materials (2024)

Rydberg excitons in cuprous oxide feature giant optical nonlinearities that may be exploited in quantum applications if suitably confined. Here, the authors show how exciton confinement can be realised by focused-ion-beam etching of Cu2O crystals without noticeable degradation of excitonic properties.

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Anindya Sundar Paul, Sai Kiran Rajendran, David Ziemkiewicz, Thomas Volz, Hamid Ohaid