Chiral terahertz lasing with Berry curvature dipoles
Optics
2025-04-14 v1
Abstract
Materials with Berry curvature dipoles (BDs) support a non-Hermitian electro-optic (EO) effect that is investigated here for lasing at terahertz (THz) frequencies. Such a system is here conceived as a stack of low-symmetry 2D materials. We show that a cavity made of such a material supports a nonreciprocal growing mode with elliptical polarization that generates an unstable resonance leading to self-sustained oscillations. Notably, we demonstrate that the chiral nature of the gain derived from the Berry dipole allows for the manipulation of the laser light's handedness by a simple reversal of the electric field bias.
Keywords
Cite
@article{arxiv.2312.15142,
title = {Chiral terahertz lasing with Berry curvature dipoles},
author = {Amin Hakimi and Kasra Rouhi and Tatiana G. Rappoport and Mario G. Silveirinha and Filippo Capolino},
journal= {arXiv preprint arXiv:2312.15142},
year = {2025}
}