Metalens and microtaper spectrometers on a fingertip

Light Sci Appl. 2023 Jul 6;12(1):166. doi: 10.1038/s41377-023-01217-z.

Abstract

A multi-foci metalens and a leaky-mode microtaper provide innovative platforms to achieve high-resolution, wideband light spectra in millimeter-sized devices, thereby paving new ways for the commercialization of on-fingertip spectrometers.