TITLE

Multipole-cancellation mechanism for high-Q cavities in the absence of a complete photonic band gap

AUTHOR(S)
Johnson, Steven G.; Fan, Shanhui; Mekis, Attila; Joannopoulos, J. D.
PUB. DATE
May 2001
SOURCE
Applied Physics Letters;5/28/2001, Vol. 78 Issue 22, p3388
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We describe and demonstrate a new mechanism for low radiation losses in structures lacking a complete band gap, and show how resonant cavities with Q>10[sup 3] can be achieved without sacrificing strong localization in 3d. This involves a forced cancellation in the lowest-order term(s) of the multipole far-field radiation expansion. We focus on the system of photonic-crystal slabs, one- to two-dimensionally periodic dielectric structures of finite height with vertical index guiding. Simulations and analytical results in 2d and 3d are presented. © 2001 American Institute of Physics.
ACCESSION #
4711260

 

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