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The Optical Gain of a Si-Based Lattice-Matched Si0.15Ge0.621Sn0.229/Si0.637Ge0.018Sn0.345 MQW Laser

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Journal of Russian Laser Research Aims and scope

Abstract

We study the optical-gain characteristics of a Si-based MQW laser, in which the active region has 20 Si0.15Ge0.621Sn0.229 quantum wells separated by 20 Si0.637Ge0.018Sn0.345 barriers. We reach a maximum optical gain of 2300 cm−1 with an estimated carrier concentration of 5·1018 cm−3, which is equivalent to the transparent current density equal to 0.5 kA/cm2. Furthermore, we discuss the optical confinement factor and modal gain. The modal gain depends sensitively on the number of the quantum wells (QWs), and this fact restricts the optical confinement factor. The modal gain of the model we proposed can reach 1500 cm−1 at the injection current density equal to 3 kA/cm2. We hope that our results show the possibility to obtain a Si-based near-infrared laser.

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Authors and Affiliations

  1. School of Microelectronics, Xidian University, Xi’an, 710071, China

    Jinge Ma, Junqin Zhang, Xiaoxu Jia & Yintang Yang

  2. Key Laboratory of Ministry of Education for Wide-Bandgap Semiconductor Materials and Devices, South Taibai Road 2, Xi’an, 710071, China

    Jinge Ma, Junqin Zhang, Xiaoxu Jia & Yintang Yang

Authors
  1. Jinge Ma
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  2. Junqin Zhang
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  3. Xiaoxu Jia
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  4. Yintang Yang
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Correspondence to Junqin Zhang.

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Manuscript submitted by the authors in English on September 5, 2016.

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Ma, J., Zhang, J., Jia, X. et al. The Optical Gain of a Si-Based Lattice-Matched Si0.15Ge0.621Sn0.229/Si0.637Ge0.018Sn0.345 MQW Laser. J Russ Laser Res 38, 76–83 (2017). https://doi.org/10.1007/s10946-017-9621-0

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  • DOI: https://doi.org/10.1007/s10946-017-9621-0

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