Finite-Size Effects in Metasurface Lasers Based on Resonant Dark States

Date
2018-08-24
Authors
Droulias, Sotiris
Koschny, Thomas
Soukoulis, Costas
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Altmetrics
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Ames Laboratory
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Physics and Astronomy
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Abstract

The quest for subwavelength coherent light sources has recently led to the exploration of dark-mode based surface lasers, which allow for independent adjustment of the lasing state and its coherent radiation output. To understand how this unique design performs in real experiments, we need to consider systems of finite size and quantify finite-size effects not present in the infinite dark-mode surface laser model. Here we find that, depending on the size of the system, distinct and even counterintuitive behavior of the lasing state is possible, determined by a balanced competition between multiple loss channels, including dissipation, intentional out-coupling of coherent radiation, and leakage from the edges of the finite system. The conclusions are crucial for the design of future experiments that will enable the realization of ultrathin coherent light sources.

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Keywords
metamaterials, metasurfaces, nanolasers, finite-size aperture, finite-size effects, dark states
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