Optical second harmonic generation in amorphous silicon metamaterial
Optical second harmonic generation in amorphous silicon metamaterial
Second harmonic generation in centrosymmetric media is forbidden. However, mesoscopic structuring at the subwavelength scale can remove the center of inversion, creating nonlinear material with substantial second-order polarizability. We report efficient optical second harmonic generation in a 90 nm thick metamaterial fabricated from amorphous silicon that results from nanostructuring with a chevron pattern that simultaneously removes the center of inversion in the material and creates a closed mode optical resonance at the fundamental frequency that further enhances the metamaterial’s effective second-order polarizability. The use of amorphous materials enables frequency converters on non-trivial platforms, such as the end-facet of optical fibres.
Xu, Jie
9221b478-b998-445a-8719-67f535043748
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
16 September 2019
Xu, Jie
9221b478-b998-445a-8719-67f535043748
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Xu, Jie, Savinov, Vassili, Plum, Eric and Zheludev, Nikolai
(2019)
Optical second harmonic generation in amorphous silicon metamaterial.
13th International Congress on Artificial Materials for Novel Wave Phenomena, , Rome, Italy.
16 - 21 Sep 2019.
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Conference or Workshop Item
(Paper)
Abstract
Second harmonic generation in centrosymmetric media is forbidden. However, mesoscopic structuring at the subwavelength scale can remove the center of inversion, creating nonlinear material with substantial second-order polarizability. We report efficient optical second harmonic generation in a 90 nm thick metamaterial fabricated from amorphous silicon that results from nanostructuring with a chevron pattern that simultaneously removes the center of inversion in the material and creates a closed mode optical resonance at the fundamental frequency that further enhances the metamaterial’s effective second-order polarizability. The use of amorphous materials enables frequency converters on non-trivial platforms, such as the end-facet of optical fibres.
Text
Optical Second Harmonic Generation In Amorphous Silicon Metamaterial
- Accepted Manuscript
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Published date: 16 September 2019
Venue - Dates:
13th International Congress on Artificial Materials for Novel Wave Phenomena, , Rome, Italy, 2019-09-16 - 2019-09-21
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Local EPrints ID: 431218
URI: http://eprints.soton.ac.uk/id/eprint/431218
PURE UUID: 9b964491-bb89-4e3a-a408-fa866fbcb29d
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Date deposited: 28 May 2019 16:30
Last modified: 16 Mar 2024 07:53
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Contributors
Author:
Jie Xu
Author:
Vassili Savinov
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