From the topological spin-Hall effect to the non-Hermitian skin effect in an elliptical micropillar chain
The topological spin-Hall effect causes different spins to propagate in opposite directions based on Hermitian physics. The non-Hermitian skin effect causes the localization of a large number of modes of a system at its edges. Here we propose a system based on exciton-polariton elliptical micropill...
Saved in:
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164435 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The topological spin-Hall effect causes different spins to propagate in
opposite directions based on Hermitian physics. The non-Hermitian skin effect causes the localization of a large number of modes of a system at its edges. Here we propose a system based on exciton-polariton elliptical micropillars hosting both the effects. The polarization splitting of the elliptical
micropillars gives rise to the topological spin-Hall effect in a one
dimensional lattice. When a circularly polarized external incoherent laser is
used to imbalance effective decay rates of the different spin polarizations,
the system transits to a non-Hermitian regime showing the skin effect. These
effects have implications for robust polariton transport as well as the
deterministic formation of multiply charged vortices and persistent currents. |
|---|