Microcavities based on multimodal interference

doi:10.1364/OE.15.006268

Microcavities based on multimodal interference

Bjørn Maes, Mihai Ibanescu, John D. Joannopoulos, Peter Bienstman, and Roel Baets »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 6268-6278 (2007)
http://dx.doi.org/10.1364/OE.15.006268

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Abstract
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Abstract

We describe intricate cavity mode structures, that are possible in waveguide devices with two or more guided modes. The main element is interference between the scattered fields of two modes at the facets, resulting in multipole or mode cancelations. Therefore, strong coupling between the modes, such as around zero group velocity points, is advantageous to obtain high quality factors. We discuss the mechanism in three different settings: a cylindrical structure with and without negative group velocity mode, and a surface plasmon device. A general semi-analytical expression for the cavity parameters describes the phenomenon, and it is validated with extensive numerical calculations.

OCIS Codes
(230.5750) Optical devices : Resonators
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optical Devices

History
Original Manuscript: February 28, 2007
Manuscript Accepted: March 22, 2007
Published: May 7, 2007

Citation
Bjørn Maes, Mihai Ibanescu, John D. Joannopoulos, Peter Bienstman, and Roel Baets, "Microcavities based on multimodal interference," Opt. Express 15, 6268-6278 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-10-6268

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References

K.J. Vahala, "Optical microcavities," Nature 424,839-846 (2003). [CrossRef] [PubMed]
M. Ibanescu, S.G. Johnson, D. Roundy, Y. Fink, and J.D. Joannopoulos, "Microcavity confinement based on an anomalous zero group-velocity waveguide mode," Opt. Lett. 30,552-554 (2005). [CrossRef] [PubMed]
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S.G. Johnson, S. Fan, A. Mekis, and J.D. Joannopoulos, "Multipole-cancellation mechanism for high-Q cavities in the absence of a complete photonic band gap," Appl. Phys. Lett. 78,3388-3390 (2001). [CrossRef]
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M. Ibanescu, S.G. Johnson, D. Roundy, C. Luo, Y. Fink, and J.D. Joannopoulos, "Anomalous dispersion relations by symmetry breaking in axially uniform waveguides," Phys. Rev. Lett. 92,063903 (2004). [CrossRef] [PubMed]
P.P.P. Debackere, P. Bienstman, and R. Baets "Adaptive Spatial Resolution: Application to Surface Plasmon Waveguide Modes," accepted for publication in Opt. Quantum Electron.
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