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4 October 2023 Dynamic nanophotonics with conducting oxides and metal nitrides: from all-optical switching to new phenomena
Alexandra Boltasseva
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126470Q (2023) https://doi.org/10.1117/12.2675488
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Transparent Conducting Oxides (TCOs) and Transition Metal Nitrides (TMNs) are emerging platforms for applications in nonlinear optics such as all-optical switching, harmonic generation and photonic time crystals and more. We report on various methods to both dynamically tune their optical properties in ultrafast time scales, and also statitcally tailor their properties. We demonstrate great control in varying the epsilon-near-zero response of TCOs such as aluminum-doped zinc oxide (AZO) and yttrium doped cadmium oxide. We also investigate the strong thickness dependence of the TCOs and TMNs optical properties. Employing the Berreman modes of TiN and AZO films on the same platform, we demonstrate variable switching speeds of an optically-pumped metasurface. We also demonstrate the nonlinear capabilities of undoped ZnO for all optical switching6 and third harmonic generation. To explore the realization of photonic time crystals, we investigate the fastest material response to an optical pump in AZO, showing sub-10 femtosecond rise time. Our approach paves the way to novel phenomena and device design with ultrafast tunable and tailorable materials.
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Alexandra Boltasseva "Dynamic nanophotonics with conducting oxides and metal nitrides: from all-optical switching to new phenomena", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126470Q (4 October 2023); https://doi.org/10.1117/12.2675488
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KEYWORDS
All optical switching
Oxides
Metals
Nanophotonics
Optical properties
Ultrafast phenomena
Nonlinear optics
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