Presentation
3 October 2024 Inverse-designed superchiral dielectric metasurfaces
Alexander V. Kildishev, Omer Yesilyurt, Vahagn Mkhitaryan, Jer-Shing Huang, Ilya Shadrivov
Author Affiliations +
Abstract
Chirality, essential for distinguishing molecular enantiomers, impacts various scientific fields. Circular dichroism (CD) spectroscopy, which measures differential absorption of circularly polarized light, is limited by weak chiral-optical interactions, yielding minimal signals. Superchiral metasurfaces, enhancing optical chirality, offer improved CD signal and interaction with chiral molecules, necessitating advanced development for accurate analysis. This study presents a novel two-stage design methodology for optimizing superchiral metasurfaces, employing a neural network-based optimizer and adjoint topology optimization for enhanced optical chirality density. The results provide a platform for sensitive CD spectroscopy, facilitating fast optimization of metasurface unit cells for better chiral molecule analysis.
Conference Presentation
© (2024) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander V. Kildishev, Omer Yesilyurt, Vahagn Mkhitaryan, Jer-Shing Huang, and Ilya Shadrivov "Inverse-designed superchiral dielectric metasurfaces", Proc. SPIE PC13109, Metamaterials, Metadevices, and Metasystems 2024, PC1310916 (3 October 2024); https://doi.org/10.1117/12.3027495
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KEYWORDS
Dielectrics

Molecular interactions

Near field optics

Polarized light

Absorbance

Circular dichroism spectroscopy

Finite-difference time-domain method

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