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arXiv · 0704.1950

Inferring periodic orbits from spectra of simple shaped micro-lasers

M. Lebental·N. Djellali·C. Arnaud·J. -S. Lauret·J. Zyss·R. Dubertrand·C. Schmit·E. Bogomolny
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Abstract

Dielectric micro-cavities are widely used as laser resonators and characterizations of their spectra are of interest for various applications. We experimentally investigate micro-lasers 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 micro-disks.

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M. Lebental, N. Djellali, C. Arnaud, J. -S. Lauret, J. Zyss, R. Dubertrand, C. Schmit, E. Bogomolny. 2007-06-15. Inferring periodic orbits from spectra of simple shaped micro-lasers. https://doi.org/10.1103/physreva.76.023830

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