Enhancement of third-order nonlinearity of thermally evaporated GeSbSe waveguides through annealing

Michael Grayson; Mo Zohrabi; Kyuyoung Bae; Jiangang Zhu; Juliet T. Gopinath; Wounjhang Park

doi:10.1117/12.2542555

25 February 2020 Enhancement of third-order nonlinearity of thermally evaporated GeSbSe waveguides through annealing

Michael Grayson, Mo Zohrabi, Kyuyoung Bae, Jiangang Zhu, Juliet T. Gopinath, Wounjhang Park

Proceedings Volume 11283, Integrated Optics: Devices, Materials, and Technologies XXIV; 1128319 (2020) https://doi.org/10.1117/12.2542555
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Chalcogenides are a material platform for infrared nonlinear optics with high transmission and nonlinearity, but are susceptible to changes in bond structure during fabrication. These changes affect both the linear and nonlinear optical properties of the chalcogenide. We analyze the structure and optical properties of thermally evaporated and annealed Ge₂₈Sb₁₂Se₆₀ to determine why these changes occur and how they can be rectified. We observe that thermally evaporated Ge₂₈Sb₁₂Se₆₀ has an increased selenium content, increased bandgap, increased concentration of heteropolar bonds, and lower third order nonlinearity. We further observe that annealing above the glass transition temperature reduced the concentration of heteropolar bonds and increased the third order nonlinearity by a factor of four.

Conference Presentation

Citation Download Citation

Michael Grayson, Mo Zohrabi, Kyuyoung Bae, Jiangang Zhu, Juliet T. Gopinath, and Wounjhang Park "Enhancement of third-order nonlinearity of thermally evaporated GeSbSe waveguides through annealing", Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128319 (25 February 2020); https://doi.org/10.1117/12.2542555

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