Inferring periodic orbits from spectra of simply shaped microlasers

M. Lebental, N. Djellali, C. Arnaud, J.-S. Lauret, J. Zyss, Remy Dubertrand, C. Schmit, E. Bogomolny

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Abstract

Dielectric microcavities are widely used as laser resonators and characterizations of their spectra are of interest for various applications. We experimentally investigate microlasers of simple shapes (Fabry-Perot, square, pentagon, and disk). Their lasing spectra consist mainly of almost equidistant peaks and the distance between peaks reveals the length of a quantized periodic orbit. To measure this length with a good precision, it is necessary to take into account different sources of refractive index dispersion. Our experimental and numerical results agree with the superscar model describing the formation of long-lived states in polygonal cavities. The limitations of the two-dimensional approximation are briefly discussed in connection with microdisks.
Original languageEnglish
Article number023830
JournalPhysical Review A
Volume76
Issue number2
DOIs
Publication statusPublished - 31 Aug 2007
Externally publishedYes

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