Ultra-simplified diffraction-based computational spectrometer

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国家科技期刊平台
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外文摘要：Miniaturizing spectrometers for compact and cost-effective mobile platforms is a major challenge in current spectroscopy research,where conventional spectrometers are impractical due to their bulky footprint.Existing miniaturized designs primarily rely on precalibrated response functions of nanophotonic structures to encode spectral information captured in a snapshot by detector arrays.Accurate spectrum reconstruction is achieved through computational techniques,but this requires precise component design,high-precision fabrication,and calibration.We propose an ultra-simplified computational spectrometer that employs a one-to-broadband diffraction decomposition strategy facilitated by a numerical regularized transform that depends only on the spectrum of the diffracted radiation.The key feature of our design is the use of a simple,arbitrarily shaped pinhole as the partial disperser,eliminating the need for complex encoding designs and full spectrum calibration.Our spectrometer achieves a reconstructed spectral peak location accuracy of better than 1 nm over a 200 nm bandwidth and excellent resolution for peaks separated by 3 nm in a bimodal spectrum,all within a compact footprint of under half an inch.Notably,our approach also reveals a breakthrough in broadband coherent diffractive imaging without requiring any prior knowledge of the broadband illumination spectrum,assumptions of non-dispersive specimens,or correction for detector quantum efficiency.

作者：

Chuangchuang Chen、Honggang Gu、Shiyuan Liu

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作者单位：

State Key Laboratory of Intelligent Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China

Optics Valley Laboratory,Wuhan,Hubei 430074,China

基金：

National Natural Science Foundation of ChinaKey Research and Development Program of Hubei ProvinceInnovation Project of Optics Valley LaboratoryNatural Science Foundation of Hubei ProvinceFundamental Research Funds for the Central UniversitiesGuangdong Basic and Applied Basic Research Foundation

项目编号：

521305042021BAA013OVL2023PY0032021CFB3222021XXJS1132023A1515030149

出版年：

2024

DOI：

10.1038/s41377-023-01355-4

光:科学与应用(英文版)

中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD

ISSN：2095-5545

年,卷(期)：2024.13(6)