Inferring periodic orbits from spectra of simple shaped micro-lasers

Details Inferring periodic orbits from spectra of simple shaped micro-lasers Inferring periodic orbits from spectra of simple shaped micro-lasers

2007-04-16

arxiv.org/abs/0704.1950v2

Physical Review A 76 023830 (2007)

Physics

Optics

13 pages, 19 figures, accepted for publication in Physical Review A

Scientific paper

10.1103/PhysRevA.76.023830

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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