Department of Physics, Indian Institute of Technology Bombay, Mumbai, India

ToPP Group

Topological Photonics and Polaritonics Group


2025

21.

G. G. Liu, S. Mandal, X. Xi, Q. Wang, C. Devescovi, A. Morales-Pérez, Z. Wang, L. Yang, R. Banerjee, Y. Long, Y. Meng, P. Zhou, Z. Gao, Y. Chong, A. García-Etxarri, M. G. Vergniory, and B. Zhang, “Photonic Axion Insulator”, Science 387,162-166 (2025).


2024

20.

R. Banerjee, S. Mandal, Y. Y. Terh, S. Lin, G. G. Liu, B. Zhang, and Y. D. Chong, “Topological disclination states and charge fractionalization in a non-Hermitian lattice”, Phys. Rev. Lett. 133, 233804 (2024).

19.

F. Jin, S. Mandal, Z. Zhang, J. Wu, W. Wen, J. Ren, B. Zhang, T. C. H. Liew, Q. Xiong, and R. Su, “Observation of perovskite topological valley exciton-polaritons at room temperature” Nature Communications 15, 10563 (2024).

18.

H. T. Teo, S. Mandal, Y. Long, H. Xue, and B. Zhang, “Pseudomagnetic suppression of non-Hermitian skin effect”, Science Bulletin 69, 1667-1673 (2024).

17.

P. Zhou, G. G. Liu, Z. Wang, S. Li, Q. Xie, Y. Zhang, S. Mandal, X. Xi, Z. Gao, L. Deng, and B. Zhang, “Realization of a quadrupole topological insulator phase in a gyromagnetic photonic crystal”, National Science Review, 11, nwae121 (2024).

16.

G. G. Liu, S. Mandal, P. Zhou, X. Xi, R. Banerjee, Y. H. Hu, M. Wei, M. Wang, Q. Wang, Z. Gao, H. Chen, Y. Yang, Y. Chong, and B. Zhang,“Localization of chiral edge states by the non-Hermitian skin effect”, Phys. Rev. Lett. 132, 113802 (2024).


2023

15.

J. Wu, S. Ghosh, Y. Gan, Y. Shi, S. Mandal, H. Sun, B. Zhang, T. C. H. Liew, R. Su, and Q. Xiong, “Higher-order topological polariton corner state lasing”, Science Advances 9, 21, eadg4322 (2023).

14.

X. Xi, B. Yan, L. Yang, Y. Meng, Z. X. Zhu, J. M. Chen, Z. Wang, P. Zhou, P. P. Shum, Y. Yang, H. Chen, S. Mandal, G. G. Liu, B. Zhang, and Z. Gao, “Topological antichiral surface states in a magnetic Weyl photonic crystal”, Nature Communications 14, 1991 (2023).

13.

S. Mandal, G. G. Liu, and B. Zhang, “Topology with Memory in Nonlinear Driven-Dissipative Photonic Lattices”, ACS Photonics 10, 1, 147–154 (2023).


2022

12.

R. Bao, S. Mandal, H. Xu, X. Xu, R. Banerjee, and T. C. H. Liew, “Spin-polarized antichiral exciton-polariton edge states”, Phys. Rev. B 106, 23, 235310 (2022).

11.

S. Mandal, R. Banerjee, and T. C. H. Liew, “From the Topological Spin-Hall Effect to the Non-Hermitian Skin Effect in an Elliptical Micropillar Chain”, ACS Photonics 9, 2, 527–539 (2022).


2021

10.

H. Xu, K. Dini, X. Xu, R. Banerjee, S. Mandal, and T. C. H. Liew, “Nonreciprocal exciton-polariton ring lattices”, Phys. Rev. B 104, 19 (2021).

9.

X. Xu, H. Xu, S. Mandal, R. Banerjee, S. Ghosh, and T. C. H. Liew, “Interaction-induced double-sided skin effect in an exciton-polariton system”, Phys. Rev. B 103, 23, 235306 (2021).

8.

R. Banerjee, S. Mandal, and T. C. H. Liew, “Optically induced topological spin-valley Hall effect for exciton polaritons”, Phys. Rev. B 103, 20, L201406 (2021).


2020

7.

S. Mandal, R. Banerjee, E. A. Ostrovskaya, and T. C. H. Liew, “Nonreciprocal Transport of Exciton Polaritons in a Non-Hermitian Chain”, Phys. Rev. Lett. 125, 12, 123902 (2020).

6.

R. Banerjee, S. Mandal, and T. C. H. Liew, “Coupling between Exciton-Polariton Corner Modes through Edge States”, Phys.Rev. Lett. 124, 6, 063901(2020).


2019

5.

S. Mandal, R. Banerjee, and T. C. H. Liew, “One-Way Reflection-Free Exciton-Polariton Spin-Filtering Channel”, Phys. Rev. Applied 12, 5, 054058 (2019).

4.

S. Mandal, K. Dini, O. V. Kibis, and T. C. H. Liew, “On the possibility of a terahertz light emitting diode based on a dressed quantum well”, Scientific Reports 9, 16320 (2019).

3.

S. Mandal, R. Ge, and T. C. H. Liew, “Antichiral edge states in an exciton polariton strip”, Phys. Rev. B 99, 11, 115423 (2019).


2018

2.

S. Mandal, T. C. H. Liew, and O. V. Kibis, “Semiconductor quantum well irradiated by a two-mode electromagnetic field as a terahertz emitter”, Phys. Rev. A 97, 4, 043860 (2018).


2017

1.

M. Klaas, S. Mandal, T. C. H. Liew, M. Amthor, S. Klembt, L. Worschech, C. Schneider, and S. Höfling, “Optical probing of the Coulomb interactions of an electrically pumped polariton condensate”, Appl. Phys. Lett. 110, 15, 151103 (2017).



  1. Ruifeng Li, Rimi Banerjee, Subhaskar Mandal, Da Li, Yang Long, Tianchi Ma, Jianwei Liu, Gui-Geng Liu, Yidong Chong, Baile Zhang, and Er-Ping Li, “Observation of non-Hermitian topological disclination states and charge fractionalization”, arXiv:2502.04922 (2025).

  2. S. Mandal, Z. Wang, R. Banerjee, H. T. Teo, P. Zhou, X. Xi, Z. Gao, G. G. Liu, and B. Zhang, “Photonic bilayer Chern insulator with corner states”, arXiv:2405.19267 (2024).

  3. F. Jin, S. Mandal, X. Wang, B. Zhang, and R. Su, “Perovskite topological exciton-polariton disclination laser at room temperature”, arXiv:2404.18360 (2024).


  1. S. Mandal, G. G. Liu, Y. Chong, and B. Zhang, “Reshaping Quantum Hall Realms with non-Hermiticity”, NTU Physics INSIGHTS (2023), Issue 1, pp. 11-12 (Newsletter).

  2. H. T. Teo, S. Mandal, Y. Long, H. Xue, and B. Zhang, “Pseudomagnetic suppression of non-Hermitian skin effect”, International Conference on Metamaterials, Photonic Crystals and Plasmonics, 2023, pp. 966–967 (conference paper).