A Design Method of Diffraction Structure Based on Metasurface for High-Resolution Spectroscopy

In this paper, a design method of diffraction structure based on metasurface is proposed for light splitting and focusing simultaneously. In the method, firstly, the light field calculation model of the proposed structure is established based on Fresnel diffraction and the transmittance function is...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-09, Vol.13 (18), p.2503
Main Authors: Hu, Jingaowa, Wang, Lingjie, Zhao, Shangnan, Ye, Haokun
Format: Article
Language:English
Subjects:
Analysis
Design techniques
Diffraction
Fresnel diffraction
High resolution
Light
Mathematical models
metasurface
Metasurfaces
Methods
multifunctional structure
off-axis meta-lens
Space surveillance
Spectroscopy
Spectrum analysis
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Description
Summary:In this paper, a design method of diffraction structure based on metasurface is proposed for light splitting and focusing simultaneously. In the method, firstly, the light field calculation model of the proposed structure is established based on Fresnel diffraction and the transmittance function is calculated. Then, the model structural parameter selection mechanism is determined, and the spectrum resolution equation of the structure is derived. Simulation results indicate that the proposed method can offer a broader working bandwidth and enhanced higher resolution compared to off-axis meta-lens. Moreover, this proposed method can be deployed in high-resolution, wide-band ultra-compact spectrometer systems potentially.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13182503