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13 October 2022 Enhanced optical nonlinearity and carrier dynamics in nano-engineered epsilon-near-zero materials (Conference Presentation)
Howard Lee, Sudip Gurung, Subhajit Bej, Aleksei Anopchenko, Kent Nguyen
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Proceedings Volume PC12196, Active Photonic Platforms 2022; PC1219604 (2022) https://doi.org/10.1117/12.2633780
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
This talk will review our recent studies on the nonlinear optical properties of conducting oxide epsilon-near-zero materials. I will present a method to engineer the field intensity enhancement of the Al-doped zinc oxide (AZO) ENZ thin films synthesized by atomic layer deposition technique. I will also discuss the observation of abnormal nonlinear temporal dynamic of hot electrons and enhanced optical nonlinearity in AZO and ITO ENZ thin films under different pump fluences and excitation angles using degenerate pump-probe spectroscopy and Z-scan nonlinearity measurement techniques. Our results on understanding the nonlinearity and ultrafast free carrier dynamics of ENZ materials will be important for efficient all-optical signal processing and nonlinear zero-index photonic applications.
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Howard Lee, Sudip Gurung, Subhajit Bej, Aleksei Anopchenko, and Kent Nguyen "Enhanced optical nonlinearity and carrier dynamics in nano-engineered epsilon-near-zero materials (Conference Presentation)", Proc. SPIE PC12196, Active Photonic Platforms 2022, PC1219604 (13 October 2022); https://doi.org/10.1117/12.2633780
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KEYWORDS
Nonlinear optics
Carrier dynamics
Atomic layer deposition
Thin films
Magneto-optics
Optical properties
Oxides
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