open access

https://hdl.handle.net/2115/58902

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

英語

many-body theory

2015-05

IEEE

IEEE journal of quantum electronics

51(5)

1-8

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.

学術雑誌論文

Accepted Manuscript

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