High-resolution spectral imaging with quasi bound states in the continuum

Lianwei Huang; Chenning Tao

doi:10.1117/12.3036190

22 November 2024 High-resolution spectral imaging with quasi bound states in the continuum

Lianwei Huang, Chenning Tao

Proceedings Volume 13239, Optoelectronic Imaging and Multimedia Technology XI; 1323903 (2024) https://doi.org/10.1117/12.3036190
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

Computational spectral imaging is an emerging interdisciplinary technique with extensive applications. Current systems based on meta-surfaces use broad-band nanophotonic encoders for spectral encoding, which requires a high sampling rate to achieve ideal spectral resolution. In this study, we propose a high-resolution computational spectral imaging system based on quasi-bound states in the continuum (quasi-BIC) achieved by breaking the C2 symmetry of a metarectangle structure. Compared to broad-band nanophotonic encoders, quasi-BIC features a high-quality factor (Q-factor), with resonance peaks that can be shifted across a wide wavelength range by adjusting a scale factor S, and the width of these peaks can be controlled by rotating orientation angles. This quasi-BIC spectral encoder enhances the accuracy of computational reconstruction and improves spectral resolution, achieving an average peak-signal-to-noise ratio (PSNR) of 35.12 dB and an average spectral angle mapper (SAM) of 0.0616 at a sampling rate of 29%. This advancement paves the way for the development of compact and high-resolution spectral imaging devices.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lianwei Huang and Chenning Tao "High-resolution spectral imaging with quasi bound states in the continuum", Proc. SPIE 13239, Optoelectronic Imaging and Multimedia Technology XI, 1323903 (22 November 2024); https://doi.org/10.1117/12.3036190

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available