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arXiv · 2312.15142

Chiral terahertz lasing with Berry curvature dipoles

Amin Hakimi·Kasra Rouhi·Tatiana G. Rappoport·Mario G. Silveirinha·Filippo Capolino
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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.

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Amin Hakimi, Kasra Rouhi, Tatiana G. Rappoport, Mario G. Silveirinha, Filippo Capolino. 2023-12-23. Chiral terahertz lasing with Berry curvature dipoles. https://doi.org/10.1103/physrevapplied.22.l041003

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