Utilizing statistics dependent spectral properties of random metasurfaces for multiwavelength cryptography

Romil Audhkhasi; Maksym Zhelyeznyakov; Steven L. Brunton; Arka Majumdar

doi:10.1117/12.3026856

2 October 2024 Utilizing statistics dependent spectral properties of random metasurfaces for multiwavelength cryptography

Romil Audhkhasi, Maksym Zhelyeznyakov, Steven L. Brunton, Arka Majumdar

Author Affiliations +

Proceedings Volume PC13130, Novel Optical Systems, Methods, and Applications XXVII; PC1313004 (2024) https://doi.org/10.1117/12.3026856
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

We investigate correlations between the configuration statistics of random metasurfaces and their spectral response. Our metasurfaces consist of a two-dimensional array of silicon nanopillars with widths sampled from a normal distribution placed on a silica substrate. We explore the effect of tuning the parameters characterizing the distribution of nanopillar widths on the wavelength-dependent transmissivity of the random metasurface in the 400 – 800 nm wavelength range. This analysis helps us create a direct mapping between the parameters of the nanopillar width distribution and the spectral responses of the random metasurfaces. We exploit this mapping to design a photonic device encoding spectrally encrypted image data in the visible wavelength range. Our findings offer new insight into the optical properties of random media and provide avenues for developing such systems for a broad range of applications.

Conference Presentation

Citation Download Citation

Romil Audhkhasi, Maksym Zhelyeznyakov, Steven L. Brunton, and Arka Majumdar "Utilizing statistics dependent spectral properties of random metasurfaces for multiwavelength cryptography", Proc. SPIE PC13130, Novel Optical Systems, Methods, and Applications XXVII, PC1313004 (2 October 2024); https://doi.org/10.1117/12.3026856

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