Subhaskar Mandal
Assistant Professor
Photograph: 
Phone: 
+91 22-25767586
Phone No Extn: 
7586
Email: 
subhaskar@iitb.ac.in
Related Links: 
Group website
Office: 

115 E

Research Interests: 
My research focuses on exploring novel physical phenomena in topological photonics, exciton-polaritons, and topological lasers. I aim to understand and design systems that exhibit unique properties stemming from topology and quantum effects, with the goal of advancing both fundamental science and practical applications in photonics.
 
Key areas of interest include:
 
  • Topological Photonics
  • Exciton-Polaritons
  • Topological Lasers
  • Nonlinear Optics
  • Light-Matter interaction
  • Non-Hermitian Physics
My work combines theoretical exploration with cutting-edge applications, such as developing low-threshold topological lasers and innovative platforms for light-matter interactions. To bridge the gap between theory and experiment, my group actively collaborates with experimentalists at IIT Bombay, other leading institutes in India, and international institutions. These collaborations play a vital role in validating and implementing our theoretical concepts, contributing to both groundbreaking discoveries and advanced photonic technologies.
 
For more details, please visit the group website.
 
 
PhD Openings: 
 
I am seeking PhD students for the August 2025 intake to work on the topics outlined above. The choice of research topics is flexible and can be tailored to individual interests. Interested candidates are encouraged to contact me via email. IITB EP and MSc students are welcome to reach out directly or visit me for a discussion.



Postdoc Openings: 

I am actively seeking Postdoctoral researchers with a PhD in theoretical photonics, theoretical condensed matter physics, or related fields. For more information on the Postdoc position and the application process, please visit IIT Bombay Career Portal and feel free to email me directly.
 
Women scientists are also encouraged to apply through the WISE Post-Doctoral Fellowship program. For details, please visit: https://online-wosa.gov.in/wosa/aboutUsPDF
 
Selected Publications: 

       Please check my Google Scholar page for the full list of publications: click here   

  1. 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).
  2. 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). 
  3. 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). 
  4. 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).
  5. 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). 
  6. 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). 
  7. S. Mandal, G. G. Liu, and B. Zhang, “Topology with Memory in Nonlinear Driven-Dissipative Photonic Lattices”, ACS Photonics 10, 1, 147–154 (2023). 
  8. 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).
  9. R. Banerjee, S. Mandal, and T. C. H. Liew,  “Coupling between exciton-polariton corner modes through edge states”, Phys. Rev. Lett. 124, 063901 (2020). 
  10. S. Mandal, R. Banerjee, and T. C. H. Liew,  “Nonreciprocal Transport of Exciton Polaritons in a Non-Hermitian Chain”, Phys. Rev. Lett. 125, 123902 (2020). 
Research Category: 
Photonics Experiments