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Proceedings Paper

High photon extraction efficiency from GaAs pillar with InAs quantum dots embedded in Niobium
Author(s): Daimotsu Kato; Yasuhiro Idutsu; Makoto Takada; Saki Ito; Hiroyasu Sato; Jae-Hoon Huh; Sotaro Ida; Hirotaka Sasakura; Hidekazu Kumano; Ikuo Suemune
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Paper Abstract

We studied the novel structure for improving the emission properties of semiconductor light sources both theoretically and experimentally. The proposed structure is a semiconductor pillar buried in a metal except for one end surface of the pillar. Photons are extracted only from the air-exposed surface. The structure consists of the GaAs nanopillar structures embedded in metal and is analyzed by the finite-difference-time-domain method. InAs quantum dots buried in a GaAs pillar are assumed to be the photon emitters. Simulations are performed on GaAs pillars with different diameters buried in Niobium. Consequently, the simulation showed 75% light extraction efficiency from the pillar to air with the optimization of the structure. In addition, we experimentally measured photoluminescence intensities of up to 40 times enhancement in embedded structures compared to normal pillar structure. These are promising for future applications to overcome single photon sources.

Paper Details

Date Published: 1 September 2009
PDF: 8 pages
Proc. SPIE 7393, Nanophotonic Materials VI, 73930I (1 September 2009); doi: 10.1117/12.828183
Show Author Affiliations
Daimotsu Kato, Hokkaido Univ. (Japan)
Yasuhiro Idutsu, Hokkaido Univ. (Japan)
Japan Science and Technology Corp. (Japan)
Makoto Takada, Hokkaido Univ. (Japan)
Saki Ito, Hokkaido Univ. (Japan)
Hiroyasu Sato, Hokkaido Univ. (Japan)
Jae-Hoon Huh, Hokkaido Univ. (Japan)
Sotaro Ida, Hokkaido Univ. (Japan)
Hirotaka Sasakura, Hokkaido Univ. (Japan)
Japan Science and Technology Corp. (Japan)
Hidekazu Kumano, Hokkaido Univ. (Japan)
Japan Science and Technology Corp. (Japan)
Ikuo Suemune, Hokkaido Univ. (Japan)
Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 7393:
Nanophotonic Materials VI
Stefano Cabrini; Taleb Mokari, Editor(s)

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