Dispersion-assisted high-dimensional photodetector

• 成果类型: Article
• 署名作者: Fan, Yandong; Huang, Weian; Zhu, Fei; Liu, Xingsi; Jin, Chunqi; Guo, Chenzi; An, Yang; Kivshar, Yuri; Qiu, Cheng-Wei; Li, Wei
• 署名单位: Chinese Academy of Sciences; Changchun Institute of Optics, Fine Mechanics & Physics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; National University of Singapore; Australian National University; Harbin Engineering University
• 刊物名称: Nature
• ISSN/ISSBN: 0028-3825
• DOI: 10.1038/s41586-024-07398-w
• 发表日期: 2024-06-06
• 关键词: polarization

摘要

Intensity, polarization and wavelength are intrinsic characteristics of light. Characterizing light with arbitrarily mixed information on polarization and spectrum is in high demand(1-4). Despite the extensive efforts in the design of polarimeters(5-18) and spectrometers(19-27), concurrently yielding high-dimensional signatures of intensity, polarization and spectrum of the light fields is challenging and typically requires complicated integration of polarization- and/or wavelength-sensitive elements in the space or time domains. Here we demonstrate that simple thin-film interfaces with spatial and frequency dispersion can project and tailor polarization and spectrum responses in the wavevector domain. By this means, high-dimensional light information can be encoded into single-shot imaging and deciphered with the assistance of a deep residual network. To the best of our knowledge, our work not only enables full characterization of light with arbitrarily mixed full-Stokes polarization states across a broadband spectrum with a single device and a single measurement but also presents comparable, if not better, performance than state-of-the-art single-purpose miniaturized polarimeters or spectrometers. Our approach can be readily used as an alignment-free retrofit for the existing imaging platforms, opening up new paths to ultra-compact and high-dimensional photodetection and imaging.