Nonreciprocal Directional Dichroism Induced by the Quantum Metric Dipole

• Published in: Physical review letters Vol. 122; no. 22; p. 227402
• Main Authors: Gao, Yang, Xiao, Di
• Format: Journal Article
• Language: English
• Published: United States 07.06.2019

We identify the quantum metric dipole as the geometric origin of the nonreciprocal directional dichroism which describes the change in the refractive index upon reversing the light propagation direction. Specifically, we find that the static limit of the nonreciprocal directional dichroism correspon...