Vertically Emitting Indium Phosphide Nanowire Lasers
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by University of Strathclyde Institutional Repository Vertically emitting indium phosphide nanowire lasers Wei-Zong Xu1,2,4†, Fang-Fang Ren1,2,4†, Dimitars Jevtics3, Antonio Hurtado3, Li Li1, Qian Gao1, Jiandong Ye1,2, Fan Wang1,5, Benoit Guilhabert3, Lan Fu1, Hai Lu2,4, Rong Zhang2,4, Hark Hoe Tan1, Martin D. Dawson3, and Chennupati Jagadish1 1 Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, Australia 2 School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China 3 Institute of Photonics, SUPA Department of Physics, University of Strathclyde, Technology and Innovation Centre, 99 George Street, G1 1RD Glasgow, U.K. 4 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China 5 Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia Abstract: Semiconductor nanowire (NW) lasers have attracted considerable research effort given their excellent promise for nanoscale photonic sources. However, NW lasers currently exhibit poor directionality and high threshold gain, issues critically limiting their prospects for on-chip light sources with extremely reduced footprint and efficient power consumption. Here, we propose a new design and experimentally demonstrate a vertically emitting indium phosphide (InP) NW laser structure showing high emission directionality and reduced energy requirements for operation. The structure of the laser combines an InP NW integrated in a cat’s eye (CE) antenna. Thanks to the antenna guidance with broken asymmetry, strong focusing ability and high-Q factor, the designed InP CE-NW lasers exhibit a higher degree of polarization, narrower emission angle, enhanced internal quantum efficiency and reduced lasing threshold.
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