Improved Spatial Resolution Achieved by Chromatic Intensity Interferometry

• URL: http://arxiv.org/abs/2102.02060v1
• Date: Wed, 3 Feb 2021 13:40:31 GMT
• Title: Improved Spatial Resolution Achieved by Chromatic Intensity Interferometry
• Authors: Lu-Chuan Liu, Luo-Yuan Qu, Cheng Wu, Jordan Cotler, Fei Ma, Ming-Yang Zheng, Xiu-Ping Xie, Yu-Ao Chen, Qiang Zhang, Frank Wilczek, and Jian-Wei Pan
• Abstract summary: Interferometers are widely used in imaging technologies to achieve enhanced spatial resolution. In previous work, we built and analyzed color erasure detectors which expand the scope of intensity interferometry. Here we experimentally demonstrate how color erasure detectors can achieve improved spatial resolution in an imaging task.
• Score: 14.245246065679247
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Interferometers are widely used in imaging technologies to achieve enhanced spatial resolution, but require that the incoming photons be indistinguishable. In previous work, we built and analyzed color erasure detectors which expand the scope of intensity interferometry to accommodate sources of different colors. Here we experimentally demonstrate how color erasure detectors can achieve improved spatial resolution in an imaging task, well beyond the diffraction limit. Utilizing two 10.9 mm-aperture telescopes and a 0.8 m baseline, we measure the distance between a 1063.6 nm source and a 1064.4 nm source separated by 4.2 mm at a distance of 1.43 km, which surpasses the diffraction limit of a single telescope by about 40 times. Moreover, chromatic intensity interferometry allows us to recover the phase of the Fourier transform of the imaged objects - a quantity that is, in the presence of modest noise, inaccessible to conventional intensity interferometry.

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