title: Proposal and demonstration of a spectrometer using a diffractive optical element with dual dispersion and focusing functionality.
abstract: We propose an optical spectrometer using a hybrid grating-Fresnel (G-Fresnel) diffractive optical element. Theoretical simulation shows that a spectral resolution of approximately 1 nm can be potentially achieved with a millimeter-sized G-Fresnel. A proof-of-concept G-Fresnel-based spectrometer with subnanometer spectral resolution is experimentally demonstrated. The proposed method provides a promising new way for realizing compact optical spectrometers.
authors.affiliation: The Pennsylvania State University, Department of Electrical Engineering, University Park, Pennsylvania 16802, USA.
authors.forename: Chuan
authors.initials: C
authors.lastname: Yang
authors.forename: Perry
authors.initials: P
authors.lastname: Edwards
authors.forename: Kebin
authors.initials: K
authors.lastname: Shi
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Liu