6 February 2009 Beam forming of light from structured metal nano-aperture vertical cavity lasers
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We report the nano-scale patterning of concentric ring-shaped metal corrugations around a sub-wavelength aperture in Ag deposited on top of a vertical-cavity surface-emitting laser. The presence of the rings results in more than a doubling of collected far-field power and a reduction in far-field angular width from 100° to 28°. These nano-aperture lasers thus have the unique property of both a small near-field spot and a relatively low beam divergence. Finite-difference timedomain simulations confirm the experimental results and show that the far-field pattern is highly sensitive to misalignment of the aperture and to the presence of multiple transverse laser modes.
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Joshua D. Sulkin, Joshua D. Sulkin, Chen Chen, Chen Chen, Placid M. Ferreira, Placid M. Ferreira, Kent D. Choquette, Kent D. Choquette, } "Beam forming of light from structured metal nano-aperture vertical cavity lasers", Proc. SPIE 7229, Vertical-Cavity Surface-Emitting Lasers XIII, 72290H (6 February 2009); doi: 10.1117/12.813410; https://doi.org/10.1117/12.813410

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