End-to-end nanophotonic inverse design for imaging and polarimetry

Nanophotonics

article

Zin Lin¹  Charles Roques-Carmes²  Raphaël Pestourie¹  Marin Soljačić²  Arka Majumdar⁴  Steven G. Johnson¹ 

[1] Department of Mathematics, Massachusetts Institute of Technology;Research Lab of Electronics, Massachusetts Institute of Technology;Department of Physics, Massachusetts Institute of Technology;Department of Electrical and Computer Engineering, University of Washington;Department of Physics, University of Washington

关键词: computational imaging;    end-to-end photonic inverse design;    inverse scattering;    meta-optics;    polarimetry;   

DOI  :  10.1515/nanoph-2020-0579

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

By codesigning a metaoptical front end in conjunction with an image-processing back end, we demonstrate noise sensitivity and compactness substantially superior to either an optics-only or a computation-only approach, illustrated by two examples: subwavelength imaging and reconstruction of the full polarization coherence matrices of multiple light sources. Our end-to-end inverse designs couple the solution of the full Maxwell equations—exploiting all aspects of wave physics arising in subwavelength scatterers—with inverse-scattering algorithms in a single large-scale optimization involving ≳104$\gtrsim {10}^{4}$ degrees of freedom. The resulting structures scatter light in a way that is radically different from either a conventional lens or a random microstructure, and suppress the noise sensitivity of the inverse-scattering computation by several orders of magnitude. Incorporating the full wave physics is especially crucial for detecting spectral and polarization information that is discarded by geometric optics and scalar diffraction theory.

【 授权许可】

CC BY