文献类型：期刊文献

英文题名：Multi-band reprogrammable phase-change metasurface spectral filters for on-chip spectrometers

作者：Zheng, Qilin[1,2];Liang, Li[1];Quan, Yunan[1];Nan, Xianghong[2];Sun, Dongqin[1];Tan, Yongsheng[1];Hu, Xin[3];Yu, Qing[4];Fang, Zebo[1]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr, MEMS, Shaoxing 312000, Peoples R China;[2]Jinan Univ, Inst Nanophoton, Guangzhou 511443, Peoples R China;[3]Soochow Univ, Key Lab Modern Opt Technol Jiangsu Prov, Suzhou 215006, Peoples R China;[4]United Nova Technol Co Ltd, Shaoxing 312000, Peoples R China

年份：2024

卷号：32

期号：7

起止页码：11548

外文期刊名：OPTICS EXPRESS

收录：SCI-EXPANDED(收录号：WOS:001276232400001)、、EI(收录号：20241415838615)、Scopus(收录号：2-s2.0-85189028382)、WOS

基金：Natural Science Foundation of Zhejiang Province (LQ24F050011) ; Key Lab of Modern Optical Technologies of Jiangsu Province of Soochow University (KJS2266) ; Science and Technology Planning Project of Shaoxing City (2022B41001) .

语种：英文

外文关键词：Antimony compounds - Germanium compounds - Spectrometers - Tellurium compounds - Tuning

外文摘要：Active optical metasurfaces provide a platform for dynamic and real-time manipulation of light at subwavelength scales. However, most active metasurfaces are unable to simultaneously possess a wide wavelength tuning range and narrow resonance peaks, thereby limiting further advancements in the field of high-precision sensing or detection. In the paper, we proposed a reprogrammable active metasurface that employs the non-volatile phase change material Ge2Sb2Te5 and demonstrated its excellent performance in on-chip spectrometer. The active metasurfaces support magnetic modes and feature Friedrich-Wintgen quasi bound states in the continuum, capable of achieving multi-resonant near-perfect absorption, a multilevel tuning range, and narrowband performance in the infrared band. Meanwhile, we numerically investigated the coupling phenomenon and the intrinsic relationship between different resonance modes under various structural parameters. Furthermore, using the active metasurfaces as tunable filters and combined with compressive sensing algorithms, we successfully reconstructed various types of spectral signals with an average fidelity rate exceeding 0.99, utilizing only 51 measurements with a single nanostructure. A spectral resolution of 0.5 nm at a center wavelength 2.538 mu m is predicted when the crystallization fractions of GST change from 0 to 20%. This work has promising potential in on-site matter inspection and point-of-care (POC) testing. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement