Multibeam emission and spatial wavelength demultiplexing in semiconductor lasers by patterning their facets with plasmonic structures is reported. Specifically, a single-wavelength laser was made to emit beams in two directions by defining on its facet two metallic gratings with different periods. The output of a dual-color laser was spatially separated according to wavelength by using a single metallic grating. The designs can be integrated with a broad range of active or passive optical components for applications such as interferometry and demultiplexing.
Multi-beam multi-wavelength semiconductor lasers
Present address: School of Electrical and Electronic Engineering & School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Ave, 639798 Singapore.
Present address: Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78758, USA.
Nanfang Yu, Mikhail A. Kats, Christian Pflügl, Markus Geiser, Qi Jie Wang, Mikhail A. Belkin, Federico Capasso, Milan Fischer, Andreas Wittmann, Jérôme Faist, Tadataka Edamura, Shinichi Furuta, Masamichi Yamanishi, Hirofumi Kan; Multi-beam multi-wavelength semiconductor lasers. Appl. Phys. Lett. 19 October 2009; 95 (16): 161108. https://doi.org/10.1063/1.3253713
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