Directional laser emission from a wavelength-scale chaotic microcavity.
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.
Song
Q H
QH
Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482, USA.
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Stone
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Cao
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Wiersig
J
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Shim
J-B
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Unterhinninghofen
J
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Fang
W
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Solomon
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