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Single-Shot Multispectral Encoding: Advancing Optical Lithography for Encryption and Spectroscopy

Title of paper
Single-Shot Multispectral Encoding: Advancing Optical Lithography for Encryption and Spectroscopy
Author
[김철주 교수 연구실] 암호화 및 분광학을 위한 페로브스카이트의 단일 샷 광학 리소그래피를 통한 다중 스펙트럼 인코딩
Publication in journal
Nano Letters
Publication date
20240903

 

[Abstract]

 

Most modern optical display and sensing devices utilize a limited number of spectral units within the visible range, based on human color perception. In contrast, the rapid advancement of machine-based pattern recognition and spectral analysis could facilitate the use of multispectral functional units, yet the challenge of creating complex, high-definition, and reproducible patterns with an increasing number of spectral units limits their widespread application. Here, we report a technique for optical lithography that employs a single-shot exposure to reproduce perovskite films with spatially controlled optical band gaps through light-induced compositional modulations. Luminescent patterns are designed to program correlations between spatial and spectral information, covering the entire visible spectral range. Using this platform, we demonstrate multispectral encoding patterns for encryption and multivariate optical converters for dispersive optics-free spectroscopy with high spectral resolution. The fabrication process is conducted at room temperature and can be extended to other material and device platforms.

 

LINK: Single-Shot Multispectral Encoding: Advancing Optical Lithography for Encryption and Spectroscopy | Nano Letters (acs.org)

DOI: doi.org/10.1021/acs.nanolett.4c02153