Nonlinear metasurfaces for all-optical signal processing

Sang-Yeon Cho; Weimin Zhou; Andrea Alu; Jason Sun; Charles Pelzman

doi:10.1117/12.3003254

13 March 2024 Nonlinear metasurfaces for all-optical signal processing

Sang-Yeon Cho, Weimin Zhou, Andrea Alu, Jason Sun, Charles Pelzman

Proceedings Volume PC12897, High Contrast Metastructures XIII; PC128970S (2024) https://doi.org/10.1117/12.3003254
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

In this talk, we present our recent findings on compound semiconductor-based nonlinear metasurfaces for all-optical signal processing. Nonlinear metasurfaces have revolutionized the field of nonlinear optics by enabling a radically different way to control light-matter interactions at the subwavelength scale. In this approach, nonlinear optical processes can be maximized by carefully choosing the shape, orientation, and arrangement of subwavelength-scale artificial atoms, called meta-atoms. By introducing Kerr nonlinearity from compound semiconductor materials, such as AlGaAs/GaAs, into a high-quality resonant metasurface, power requirement to achieve optical bistability can be greatly reduced. Optical bistability can has been actively studied due to its potential applications for all-optical switching and optical logic gates. In our research, we will utilize intensity-dependent refractive index in a semiconductor metasurface to realize refractive bistability for all-optical signal processing. Different design strategies will be discussed to excite quasi-bound waves with a high-quality factor and a small mode volume.

Conference Presentation

Citation Download Citation

Sang-Yeon Cho, Weimin Zhou, Andrea Alu, Jason Sun, and Charles Pelzman "Nonlinear metasurfaces for all-optical signal processing", Proc. SPIE PC12897, High Contrast Metastructures XIII, PC128970S (13 March 2024); https://doi.org/10.1117/12.3003254

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