Enhancement of vertical emission in photonic crystal nanolasers

被引:32
作者
Narimatsu, Michimasa [1 ]
Kita, Shota
Abe, Hiroshi
Baba, Toshihiko
机构
[1] Yokohama Natl Univ, Dept Elect & Comp Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
关键词
arsenic compounds; Brillouin zones; Fourier transform optics; gallium compounds; III-V semiconductors; indium compounds; laser cavity resonators; lenses; nanophotonics; photonic crystals; quantum well lasers; LASER;
D O I
10.1063/1.3696056
中图分类号
O59 [应用物理学];
学科分类号
摘要
Photonic crystal nanolasers have a drawback of weak vertical emission, which degrades the detection efficiency from above. We show that the vertical emission is enhanced greatly by introducing asymmetry to the cavity, so that Fourier components around the Brillouin zone boundary are shifted to the zone center. When the light output is collected from above by an objective lens with a numerical aperture of 0.42, the efficiency for the optimized devices, with and without nanoslot, are calculated to be 26 and 153 times that of the original structure. We confirm the experimental and calculated results to be in good agreement. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3696056]
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页数:3
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