Room temperature lasing in GeSn alloys: A path to CMOS-compatible infrared lasers

POSTER

Abstract

The semiconductor industry has been pushing silicon photonics development for many years, resulting in the realization of many CMOS-compatible optoelectronic devices. However, one challenge that has not been overcome is the development of Si-based lasers. Recently, GeSn alloys grown on Si have shown much promise in the field of infrared optoelectronics. These alloy films are compatible with CMOS processing, have band gaps in the infrared, and the band structure of GeSn can be tuned via Sn concentration to induce direct band gap emission. In this work, we report on room temperature emission in optically-pumped waveguides fabricated from Ge0.956Sn0.044 and Ge0.928Sn0.072 films grown epitaxially on Si(100) substrates. The waveguides were defined using standard UV photolithography and dry-etched in a Cl plasma. The end facets were mirror polished, and Al was deposited on one facet to enhance cavity quality. The waveguides were optically-pumped using a 976nm wavelength solid-state laser, and the corresponding emission was measured. The dependence of the emission power on the pump power shows the simulated emission is highly amplified and with higher Sn concentration sample shows shaper curve.

Authors

  • Zairui Li

    Electro-Optics Program, University of Dayton, Dayton, OH 45469

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None

  • Brian Knauf

    Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469, Bowling Green State University, Washington State University, Nuclear Radiation Center, Washington State University, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Nano-C, Inc., U. S. Army Research Laboratory, Professor, TA, None