Wet-etched phononic crystal waveguiding on GaAs
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Authors
Muzar, Edward
Azodi Aval, Golnaz
Stotz, James AH
Date
2018-01-10
Type
journal article
Language
en
Keyword
Surface Acoustic Wave , Phononic Crystal , Waveguide , GaAs
Alternative Title
Abstract
A wet-etched phononic crystal waveguide in GaAs with approximately two micron deep inclusions is studied both numerically and experimentally for controlled surface acoustic wave propagation. Numerically, the phononic crystal was modelled using the finite element method (FEM) with COMSOL Multiphysics, and the surface displacement of the acoustic waves was measured using optical interferometry. The computed filter response of the phononic crystal confirmed that the phononic crystal was an effective stop band filter in the interval of 400 MHz and 450 MHz. An L1 linear defect waveguide with a stepped funnel entrance design is shown to perform well at a surface acoustic wave frequency of 410.344 MHz and in agreement to simulated results. The phononic crystal waveguide system shows promise for use in acoustic control of GaAs-based quantum nanostructures.
Description
Citation
J. Phys. D: Appl. Phys. 51, 044001 (2018)
Publisher
IOP Publishing