Excitons In Monolayers And Twisted Bilayers – Pushing To The Limits

2023-02-07 Prof. Kausik Majumdar, Department of Electrical Communication Engineering, IISc. B

ABSTRACT :

Ultra-thin layers of semiconductors and their van der Waals heterojunctions are excellent platforms to study exciton and many-body interaction. In this talk, I shall discuss about our recent results on pushing the exciton linewidth and polarization in monolayer semiconductors to the fundamental limits. In particular, I shall show experimental techniques to achieve ~100% valley coherent exciton, and emission linewidth as narrow as what is governed by the limit of the homogeneous broadening. Towards the end, I shall also talk about the dynamic tuning of moiré potential in twisted hetero-bilayers and using Moiré-trapped exciton as a spectroscopic probe.

Event Name

Seminars

Place

HSB 263

Start Time

16:00

End Time

17:00

External Link

PDF to Talk