Material Gain Analysis of GeSn/SiGeSn Quantum Wells for Mid-Infrared Si-Based Light Sources Based on Many-Body Theory

• Fujisawa, Takeshi

• Saitoh, Kunimasa

Abstract

Material gain of GeSn/SiGeSn quantum wells, which can be grown on Si substrate using a buffer layer, is analyzed based on microscopic many-body theory (MBT) for mid-infrared light sources based on Si photonics. MBT can consider a gain spectrum broadening associated with scattering phenomena, such as Coulomb scattering, based on quantum field theory, and does not need any artificial fitting parameters, such as a relaxation time, used in conventional analysis. Not only Gamma-but also carrier distributions in L-points are considered for the gain analysis. Using MBT, the quantum well structures maximizing the material gain and the differential gain at the threshold are investigated in terms of the well thickness, the strain, and the energy difference of quantum states between Gamma- and L-points.

Journal

• IEEE journal of quantum electronics

  IEEE journal of quantum electronics 51 (5), 1-8, 2015-05

  IEEE

Keywords

• Mid-infrared photonics
• Si photonics
• GeSn quantum wells
• many-body theory

Details

• CRID: 1050564288971582208
• NII Article ID: 120005606033
• HANDLE: 2115/58902
• ISSN: 00189197
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles