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Song, Q H; Ge, L; Stone, A D; Cao, H; Wiersig, J; Shim, J-B; Unterhinninghofen, J; Fang, W; Solomon, G S
Physical review letters, 08/2010, Letnik: 105, Številka: 10Journal Article
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.
