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3 August 2021 Enhancement of optical nonlinearity and spontaneous emission in nano-engineered epsilon-near-zero materials
Howard Lee, Sudip Gurung, Khant Minn, Aleksei Anopchenko, Subhajit Bej
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Proceedings Volume 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX; 117971E (2021) https://doi.org/10.1117/12.2594948
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
This talk will review our recent studies on the nonlinear and emission properties of conducting oxide and metallic nitride epsilon-near-zero (ENZ) 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 (ALD) technique. I will then 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 a degenerate pump-probe spectroscopy technique. Finally, I will present the first comprehensive study of photoluminescence from a 2D material placed near ENZ films and its dependence on the losses of materials, as well as the spectral response of such emitters with excitation wavelengths across the ENZ regime. This work was supported in part by the National Science Foundation (grant number: 1752295) and AFOSR-AOARD (FA2386-18-1-4099)
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Howard Lee, Sudip Gurung, Khant Minn, Aleksei Anopchenko, and Subhajit Bej "Enhancement of optical nonlinearity and spontaneous emission in nano-engineered epsilon-near-zero materials", Proc. SPIE 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX, 117971E (3 August 2021); https://doi.org/10.1117/12.2594948
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KEYWORDS
Nonlinear optics
Atomic layer deposition
Thin films
Electrons
Luminescence
Magneto-optics
Optical properties
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