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Luminescence Properties in Er,O-codoped GaAs Light-Emitting Devices with Double Excitation Mechanism

  • Yasufumi Fujiwara (a1), Kei Fujii (a2), Ayafumi Fujita (a3), Yuji Ota (a4), Yoshiaki Ito (a5), Takashi Kawasaki (a6), Kota Noguchi (a7), Takahiro Tsuji (a8), Atsushi Nishikawa (a9) and Yoshikazu Terai (a10)...

Abstract

We fabricated a laser diode (LD) exhibiting a lasing from strained GaInAs quantum wells (QWs) embedded in Er,O-codoped GaAs (GaAs:Er,O) by organometallic vapor phase epitaxy (OMVPE). The lasing wavelength was designed to tune to the energy separation between the second excited states 4 I 11/2 and the ground state 4 I 15/2 of Er3+ ions. The threshold current for the lasing at room temperature was six times larger than that of a GaInAs QW-LD without Er doping, reflecting ultrafast carrier capture by an Er-related trap in GaAs:Er,O. The Er intensity revealed initially steep increase with injected current density in the region for spontaneous emission from the GaInAs QWs. In the stimulated QW emission region, the intensity continued to increase with the current density.

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Keywords

Luminescence Properties in Er,O-codoped GaAs Light-Emitting Devices with Double Excitation Mechanism

  • Yasufumi Fujiwara (a1), Kei Fujii (a2), Ayafumi Fujita (a3), Yuji Ota (a4), Yoshiaki Ito (a5), Takashi Kawasaki (a6), Kota Noguchi (a7), Takahiro Tsuji (a8), Atsushi Nishikawa (a9) and Yoshikazu Terai (a10)...

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