Terahertz all-silicon metasurfaces with off-axis bifocal characteristics for polarization detection

Autor: Li Hui, Duan Shouxin, Zheng Chenglong, Xu Hang, Li Jie, Song Chunyu, Yang Fan, Shi Wei, Zhang Yating, Shen Yun, Yao Jianquan
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Nanophotonics, Vol 12, Iss 16, Pp 3359-3371 (2023)
Druh dokumentu: article
ISSN: 2192-8614
DOI: 10.1515/nanoph-2023-0277
Popis: Functional devices for terahertz (THz) polarization detection in transmission mode are highly desired in integrated applications, but traditional polarization measurement systems are bulky and highly cost. The combination between all-silicon metasurfaces and focused beams carrying polarization information has offered a new opportunity for miniaturized polarization detection behavior. Here, we investigate and experimentally demonstrate a new scheme for realizing efficiently miniaturized polarization detection behavior based on the polarization multiplexing encoding technique. The full-Stokes parameter matrix of the incident polarization state can be reconstructed in a single snapshot by using a microprobe to record, pixel by pixel, the complex amplitude information contained in a pre-designed plane. Subsequently, the polarization detection capability of the proposed design principle is evaluated using random polarization states defined on the surface of a standard Poincaré sphere (PS). Such a scheme offers potential applications for the development of compact photonic meta-platforms for polarization detection in transmission mode, being highly favored in polarization high-resolution imaging, remote sensing, and THz communications.
Databáze: Directory of Open Access Journals