Nonlocal Coherent Optical Nonlinearities of a Macroscopic Quantum System
Phys. Rev. Lett. 135, 183801 – Published 28 October, 2025
DOI: https://doi.org/10.1103/jrds-3tyk
Abstract
The optical responses of solids are typically understood to be local in space. Whether locality holds for the optical response of a macroscopic quantum system has, however, been largely unexplored. Here, we use multidimensional coherent spectroscopy at the optical diffraction limit to demonstrate nonlocal optical nonlinearities in a semiconductor microcavity. These nonlocal optical responses are both coherent and quantum in nature, deriving from the macroscopic length scale of confined exciton-polariton wave functions.
