Origin of optical losses in gallium arsenide disk whispering gallery resonators

Parrain, David, Baker, Christophe, Wang, Guillaume, Guha, Biswarup, Santos, Eduardo Gil, Lemaitre, Aristide, Senellart, Pascale, Leo, Giuseppe, Ducci, Sara and Favero, Ivan (2015) Origin of optical losses in gallium arsenide disk whispering gallery resonators. Optics Express, 23 15: 19656-19672. doi:10.1364/OE.23.019656

Author Parrain, David
Baker, Christophe
Wang, Guillaume
Guha, Biswarup
Santos, Eduardo Gil
Lemaitre, Aristide
Senellart, Pascale
Leo, Giuseppe
Ducci, Sara
Favero, Ivan
Title Origin of optical losses in gallium arsenide disk whispering gallery resonators
Journal name Optics Express   Check publisher's open access policy
ISSN 1094-4087
Publication date 2015-07-01
Year available 2015
Sub-type Article (original research)
DOI 10.1364/OE.23.019656
Open Access Status DOI
Volume 23
Issue 15
Start page 19656
End page 19672
Total pages 17
Place of publication Washington, DC, United States
Publisher Optical Society of America
Language eng
Abstract Whispering gallery modes in GaAs disk resonators reach half a million of optical quality factor. These high Qs remain still well below the ultimate design limit set by bending losses. Here we investigate the origin of residual optical dissipation in these devices. A Transmission Electron Microscope analysis is combined with an improved Volume Current Method to precisely quantify optical scattering losses by roughness and waviness of the structures, and gauge their importance relative to intrinsic material and radiation losses. The analysis also provides a qualitative description of the surface reconstruction layer, whose optical absorption is then revealed by comparing spectroscopy experiments in air and in different liquids. Other linear and nonlinear optical loss channels in the disks are evaluated likewise. Routes are given to further improve the performances of these miniature GaAs cavities.
Keyword Inas quantum-dot
2-photon absorption
Gaas microdisks
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 25 Nov 2015, 03:07:00 EST by Christopher Baker on behalf of Scholarly Communication and Digitisation Service