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An optics-free single-pixel spectrometer using a broadband and tunable dynamic detector | | Ling-Dong Kong
; Qing-Yuan Zhao
; Hui Wang
; Hai-Yang-Bo Lu
; Hao Hao
; Shu-Ya Guo
; Xue-Cou Tu
; La-Bao Zhang
; Xiao-Qing Jia
; Lin Kang
; Xing-Long Wu
; Jian Chen
; Pei-Heng Wu
; | | Date: |
4 Nov 2020 | | Abstract: | Optical spectrometers are the central instruments for exploring the
interaction between light and matter. The current pursuit is to design a
spectrometer without the need for wavelength multiplexing optics to effectively
reduce the complexity and size of the hardware. Based on computational
spectroscopic results and combining a broadband-responsive dynamic detector, we
successfully demonstrate an optics-free single-pixel spectrometer which maps
the tunable quantum efficiency of a superconducting nanowire into an
ill-conditioned matrix to build a solvable reverse mathematical equation. Such
a spectrometer can realize a broadband spectral responsivity ranging from 600
to 2000 nm. The spectral resolution at the telecom is 6 nm, exceeding the
energy resolving capacity of existing infrared single-photon detectors.
Meanwhile, benefiting from the optics free setup precise time-of-flight
measurements can be simultaneously achieved. This work provides a revolutionary
way for building multifunctional spectrometers, which can be upgraded to a
hyperspectral camera straightforwardly with detector arrays. | | Source: | arXiv, 2011.02191 | | Services: | Forum | Review | PDF | Favorites | |
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