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Fabrication and coupling to planar high-Q silica disk microcavities

Kippenberg, T. J. and Spillane, S. M. and Armani, D. K. and Vahala, K. J. (2003) Fabrication and coupling to planar high-Q silica disk microcavities. Applied Physics Letters, 83 (4). pp. 797-799. ISSN 0003-6951. doi:10.1063/1.1593833.

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Using standard lithographic techniques, we demonstrate fabrication of silica disk microcavities, which exhibit whispering-gallery-type modes having quality factors (Q) in excess of 1 million. Efficient coupling (high extinction at critical coupling and low, nonresonant insertion loss) to and from the disk structure is achieved by the use of tapered optical fibers. The observed high Q is attributed to the wedged-shaped edge of the disk microcavity, which is believed to isolate modes from the disk perimeter and thereby reduce scattering loss. The mode spectrum is measured and the influence of planar confinement on the mode structure is investigated. We analyze the use of these resonators for very low loss devices, such as add/drop filters.

Item Type:Article
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Kippenberg, T. J.0000-0002-3408-886X
Vahala, K. J.0000-0003-1783-1380
Additional Information:©2003 American Institute of Physics. (Received 24 March 2003; accepted 20 May 2003) We appreciate and thank William Green and Alireza Ghaffari for their help and advice in microfabrication. This research was funded by the DARPA, the NSF, and CALTECH Lee Center for advanced networking.
Subject Keywords:microcavities; optical fabrication; Q-factor; optical fibre couplers; optical losses; cavity resonator filters; optical filters; photolithography; etching; silicon compounds
Issue or Number:4
Record Number:CaltechAUTHORS:KIPapl03
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1259
Deposited By: Archive Administrator
Deposited On:06 Jan 2006
Last Modified:08 Nov 2021 19:08

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