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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 9 — May. 1, 2007
  • pp: 1093–1095

High-Q-preserving coupling between a spiral and a semicircle μ-cavity

G. D. Chern, G. E. Fernandes, R. K. Chang, Q. Song, L. Xu, M. Kneissl, and N. M. Johnson  »View Author Affiliations

Optics Letters, Vol. 32, Issue 9, pp. 1093-1095 (2007)

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We present an efficient design for direct coupling between a spiral-shaped and a semicircle-shaped microcavity (μ-cavity) as an alternative to traditional evanescent wave coupling for planar integrated photonic technology. We observe the preservation of the high Q-value of the spiral oscillator when coupled to a semicircle under current injection using an AlGaAs single-quantum-well heterostructure. With slight alterations to the directly coupled μ-cavity configuration, such as coupling shape and overlap distance, the number of observed modes and output intensity are changed. AlGaAs and InGaN spiral-shaped microcavities have unidirectional emission normal to the spiral notch.

© 2007 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: November 13, 2006
Revised Manuscript: February 12, 2007
Manuscript Accepted: February 13, 2007
Published: April 3, 2007

G. D. Chern, G. E. Fernandes, R. K. Chang, Q. Song, L. Xu, M. Kneissl, and N. M. Johnson, "High-Q-preserving coupling between a spiral and a semicircle μ-cavity," Opt. Lett. 32, 1093-1095 (2007)

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