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Parrain D, Baker C, Wang G, et al. Origin of optical losses in gallium arsenide disk whispering gallery resonators. Opt Express. 2015;23(15):19656-72doi: 10.1364/OE.23.019656.
Parrain, D., Baker, C., Wang, G., Guha, B., Santos, E. G., Lemaitre, A., Senellart, P., Leo, G., Ducci, S., & Favero, I. (2015). Origin of optical losses in gallium arsenide disk whispering gallery resonators. Optics express, 23(15), 19656-72. https://doi.org/10.1364/OE.23.019656
Parrain, David, et al. "Origin of optical losses in gallium arsenide disk whispering gallery resonators." Optics express vol. 23,15 (2015): 19656-72. doi: https://doi.org/10.1364/OE.23.019656
Parrain D, Baker C, Wang G, Guha B, Santos EG, Lemaitre A, Senellart P, Leo G, Ducci S, Favero I. Origin of optical losses in gallium arsenide disk whispering gallery resonators. Opt Express. 2015 Jul 27;23(15):19656-72. doi: 10.1364/OE.23.019656. PMID: 26367623.
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Opt Express. 2015 Jul 27;23(15):19656-72. doi: 10.1364/OE.23.019656.

Origin of optical losses in gallium arsenide disk whispering gallery resonators.

Optics express

David Parrain, Christophe Baker, Guillaume Wang, Biswarup Guha, Eduardo Gil Santos, Aristide Lemaitre, Pascale Senellart, Giuseppe Leo, Sara Ducci, Ivan Favero

PMID: 26367623 DOI: 10.1364/OE.23.019656

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.

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