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Proceedings Paper

Focused ion beam engineered disc resonators
Author(s): D. C. Aveline; L. M. Baumgartel; B. Ahn; G. Lin; N. Yu
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Paper Abstract

We report the demonstration of whispering gallery mode (WGM) resonators augmented by focused ion beam (FIB) microfabrication. We demonstrate that we can precisely mill features directly into the perimeter of crystalline disc optical resonators. By cutting a narrow opening completely through the disc, we can create full access to the internal modes. Applying FIB techniques, we can also precisely engrave a grating structure on the disc surface. The diffraction grating provides a simple and highly directional free-space coupling mechanism with superior stability to evanescent coupling techniques. These embedded gratings can also provide control of the resonance spectrum, significantly reducing the mode density. This FIB fabrication process does not introduce significant loss; Q~-108 has been demonstrated. The wavelength dependence of the diffraction angle was found to be in excellent agreement with grating theory. The versatility of mode accessibility, spectral control and far-field grating coupling will have significant impact in WGM resonator applications in lasers, sensors, and optoelectronics.

Paper Details

Date Published: 22 February 2013
PDF: 9 pages
Proc. SPIE 8600, Laser Resonators, Microresonators, and Beam Control XV, 860016 (22 February 2013); doi: 10.1117/12.2005952
Show Author Affiliations
D. C. Aveline, Jet Propulsion Lab. (United States)
L. M. Baumgartel, Jet Propulsion Lab. (United States)
Univ. of Southern California (United States)
B. Ahn, Univ. of Southern California (United States)
Ajou Univ. (Korea, Republic of)
G. Lin, Jet Propulsion Lab. (United States)
N. Yu, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 8600:
Laser Resonators, Microresonators, and Beam Control XV
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke; Kunihiko Washio, Editor(s)

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