Abstract:
Interaction-free quantum imaging is a novel quantum imaging technique based on the Zou-Wang-Mandel quantum interference effect. This work utilized the path-entangled wavelength-nondegenerate photon pairs to achieve decoupling between probe photons and imaging photons, significantly enhancing the background noise photon suppression capability of active illumination imaging systems. Experimental results demonstrate that the system can operate in environments with same-wavelength background noise far stronger than the probe photon intensity while maintaining an imaging frame rate exceeding 30 frame/s, without requiring post-processing techniques such as coincidence counting or reconstruction. This technology promises to advance laboratory-based quantum imaging into practical applications, providing pivotal supports for the scenarios demanding stringent suppression of background noise photons.