Large second-order nonlinearity in asymmetric metallic quantum wells

Steven Bopp; Haoliang Qian; Shilong Li; Zhaowei Liu

doi:10.1117/12.2568800

20 August 2020 Large second-order nonlinearity in asymmetric metallic quantum wells

Steven Bopp, Haoliang Qian, Shilong Li, Zhaowei Liu

Proceedings Volume 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII; 114621V (2020) https://doi.org/10.1117/12.2568800
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

Investigation of new plasmonic material platforms with large optical nonlinearity is crucial for the continued development of nonlinear optics and its applications. Here we report an enhanced second order nonlinear effect in metallic quantum wells (QWs) where the intersubband transition plays a dominant role. Centrosymmetry in these metallic QWs is broken by forming multilayers with chemically and structurally distinct barrier oxides above and below a metal nanofilm. For Au-based QWs, we show that a large χ(2), measured by second harmonic generation (SHG), around 229.6 pm/V at the near infrared (NIR) wavelength of 940 nm was achieved in an asymmetric metallic QW of SiO2|Au|HfO2 on a fused silica substrate.

Conference Presentation

Citation Download Citation

Steven Bopp, Haoliang Qian, Shilong Li, and Zhaowei Liu "Large second-order nonlinearity in asymmetric metallic quantum wells", Proc. SPIE 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII, 114621V (20 August 2020); https://doi.org/10.1117/12.2568800

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