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Proceedings Paper

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

Paper Details

Date Published: 25 February 2020
PDF: 11 pages
Proc. SPIE 11283, Integrated Optics: Devices, Materials, and Technologies XXIV, 1128319 (25 February 2020); doi: 10.1117/12.2542555
Show Author Affiliations
Michael Grayson, Univ. of Colorado Boulder (United States)
Mo Zohrabi, Univ. of Colorado Boulder (United States)
Kyuyoung Bae, Univ. of Colorado Boulder (United States)
Jiangang Zhu, Univ. of Colorado Boulder (United States)
Juliet T. Gopinath, Univ. of Colorado Boulder (United States)
Wounjhang Park, Univ. of Colorado Boulder (United States)


Published in SPIE Proceedings Vol. 11283:
Integrated Optics: Devices, Materials, and Technologies XXIV
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

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