Abstract
Mid-infrared (MIR) spectroscopy has numerous industrial applications and is usually performed with Fourier-transform infrared (FTIR) spectrometers. While these work well for many purposes, there is currently much interest in alternative approaches that are smaller and lighter, i.e., MIR microspectrometers. Here we investigate all-dielectric metasurfaces as spectral filters for MIR microspectrometers. Two metasurface types are studied. For the first, we design, fabricate, and test a metasurface with a narrow and angularly tunable transmission stop band. We use it to reconstruct the transmission spectra of various materials. The second metasurface, investigated theoretically, possesses narrow passband features via symmetry-protected bound states in the continuum.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Benjamin Craig, Vivek Raj Shrestha, Jiajun Meng, Jasper J. Cadusch, and Kenneth B. Crozier
Opt. Lett. 43(18) 4481-4484 (2018)
Henry Tan, Jasper J. Cadusch, Jiajun Meng, and Kenneth B. Crozier
Opt. Express 30(11) 18330-18347 (2022)
Jun Rong Ong, Hong Son Chu, Valerian Hongjie Chen, Alexander Yutong Zhu, and Patrice Genevet
Opt. Lett. 42(13) 2639-2642 (2017)