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Phys Rev Lett. 2010 Sep 3;105(10):103902. Epub 2010 Aug 31.

Directional laser emission from a wavelength-scale chaotic microcavity.

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  • 1Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482, USA.

Abstract

We demonstrate directional output from a deformed disk laser of dimensions comparable to the emission wavelength. Unlike larger deformed cavity lasers, which exhibit universal output directionality determined by chaotic ray dynamics, the far-field patterns differ between lasing modes. The directional emission results from weak coupling of isotropic high-quality modes to anisotropic low-quality modes, combined with chiral symmetry breaking of clockwise and counterclockwise propagating waves. This mechanism makes it possible to control the output properties of wavelength-scale lasers.

PMID:
20867521
DOI:
10.1103/PhysRevLett.105.103902
[PubMed]
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