Localized exciton and its stimulated emission in surface mode from single-layer <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">In</mi></mrow><mrow><mi>x</mi></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant="normal">Ga</mi></mrow><mrow><mn>1</mn><mi>−</mi><mi>x</mi></mrow></msub></mrow><mi mathvariant="normal">N</mi></math></span>

Akihiro Satake; Yasuaki Masumoto; Takao Miyajima; Tsunenori Asatsuma; Fumihiko Nakamura; Masao Ikeda

doi:10.1103/PhysRevB.57.R2041

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Localized exciton and its stimulated emission in surface mode from single-layer ${In}_{x} {Ga}_{1 - x} N$

Akihiro Satake, Yasuaki Masumoto, Takao Miyajima, Tsunenori Asatsuma, Fumihiko Nakamura, and Masao Ikeda

Phys. Rev. B 57, R2041(R) – Published 15 January 1998

Abstract

Exciton localization in ${In}_{x} {Ga}_{1 - x} N$ was studied. At 2 K, the time-integrated photoluminescence (PL) spectrum showed a Stokes shift from the absorption shoulder and broadening at the lower photon energy side. Site-selectively excited PL measurements determined the mobility edge. The exciton relaxation processes were studied by use of time-resolved PL spectroscopy. The PL decay time increased with the decrease of the detection-photon energy, indicating the dynamical features of exciton localization. In addition, we observed localized exciton luminescence turned into stimulated emission just below the mobility edge.

Received 11 June 1997

DOI:https://doi.org/10.1103/PhysRevB.57.R2041

Authors & Affiliations

Akihiro Satake and Yasuaki Masumoto

Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Takao Miyajima, Tsunenori Asatsuma, Fumihiko Nakamura, and Masao Ikeda

Research Center, Sony Corporation, Yokohama, Kanagawa 240, Japan

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Vol. 57, Iss. 4 — 15 January 1998

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Physical Review B

covering condensed matter and materials physics