Wednesday Colloquia

Optical Anderson localization in low-dimensional, non-Hermitian systems.

by Prof. Sushil Mujumdar (TIFR Mumbai)

Wednesday, December 8, 2021 from to (Asia/Kolkata)
at AG-66 and via ZOOM webinar ( Zoom link: )
Meeting ID: 979 6325 9354 Pass code: 04072020
We discuss our recent experimental and theoretical results on two-dimensional disordered systems with open boundaries. Measurement of spectral statistics revealed a conflicting behavior in the statistical parameters, which were explained by a tight-binding model augmented with dissipation[1]. The model was further used to study localization at two limits of disorder, namely, amorphous and near-periodic disorder. Discrepant transport parameters at the two limits of disorder predicted by the model were excellently reproduced by our follow-up experiments[2]. Finally, the model was applied to examine a one-dimensional, dissipative hybrid system, which suggested an anomalous enhancement of transport under localizing disorder[3].

[1] Phys. Rev. B 100, 060201(R) (2019) Editors' Suggestion.
[2] Phys. Rev. B 102, 220202(R) (2020)
[3] Phys. Rev. Lett. 124, 123901 (2020)