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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 8 — Apr. 15, 2006
  • pp: 1073–1075

Mode-coupling analysis of three-dimensional microdisk resonators by the finite-difference time-domain technique

Xian-Shu Luo, Yong-Zhen Huang, and Qin Chen  »View Author Affiliations


Optics Letters, Vol. 31, Issue 8, pp. 1073-1075 (2006)
http://dx.doi.org/10.1364/OL.31.001073


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Abstract

Quality factor enhancement due to mode coupling is observed in a three-dimensional microdisk resonator. The microdisk, which is vertically sandwiched between air and a substrate, with a radius of 1 μ m , a thickness of 0.2 μ m , and a refractive index of 3.4, is considered in a finite-difference time-domain (FDTD) numerical simulation. The mode quality factor of the fundamental mode HE 71 decreases with an increase of the refractive index of the substrate, n sub , from 2.0 to 3.17. However, the mode quality factor of the first-order mode HE 72 reaches a peak value at n sub = 2.7 because of the mode coupling between the fundamental and the first-order modes. The variation of mode field distributions due to the mode coupling is also observed. This mechanism may be used to realize high-quality-factor modes in microdisks with high-refractive-index substrates.

© 2006 Optical Society of America

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.5960) Lasers and laser optics : Semiconductor lasers
(200.0200) Optics in computing : Optics in computing
(260.6970) Physical optics : Total internal reflection

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 11, 2005
Revised Manuscript: January 8, 2006
Manuscript Accepted: January 16, 2006

Citation
Xian-Shu Luo, Yong-Zhen Huang, and Qin Chen, "Mode-coupling analysis of three-dimensional microdisk resonators by the finite-difference time-domain technique," Opt. Lett. 31, 1073-1075 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-8-1073


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