Strain Engineered Electrically Pumped SiGeSn Microring Lasers on Si

Marzban B, Seidel L, Liu T, Wu K, Kiyek V, Zoellner MH, Ikonic Z, Schulze J, Grutzmacher D, Capellini G, Oehme M, Witzens J, Buca D (2022)

Publication Type: Journal article

Publication year: 2022

Journal

ACS Photonics American Chemical Society

DOI: 10.1021/acsphotonics.2c01508

Abstract

SiGeSn holds great promise for enabling fully group-IV integrated photonics operating at wavelengths extending in the mid-infrared range. Here, we demonstrate an electrically pumped GeSn microring laser based on SiGeSn/GeSn heterostructures. The ring shape allows for enhanced strain relaxation, leading to enhanced optical properties, and better guiding of the carriers into the optically active region. We have engineered a partial undercut of the ring to further promote strain relaxation while maintaining adequate heat sinking. Lasing is measured up to 90 K, with a 75 K T0. Scaling of the threshold current density as the inverse of the outer circumference is linked to optical losses at the etched surface, limiting device performance. Modeling is consistent with experiments across the range of explored inner and outer radii. These results will guide additional device optimization, aiming at improving electrical injection and using stressors to increase the bandgap directness of the active material.

Involved external institutions

Universität Stuttgart DE Germany (DE) Leibniz-Institut für innovative Mikroelektronik / IHP GmbH - Innovations for High Performance Microelectronics DE Germany (DE) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen DE Germany (DE) University of Leeds GB United Kingdom (GB)

How to cite

APA:

Marzban, B., Seidel, L., Liu, T., Wu, K., Kiyek, V., Zoellner, M.H.,... Buca, D. (2022). Strain Engineered Electrically Pumped SiGeSn Microring Lasers on Si. ACS Photonics. https://dx.doi.org/10.1021/acsphotonics.2c01508

MLA:

Marzban, Bahareh, et al. "Strain Engineered Electrically Pumped SiGeSn Microring Lasers on Si." ACS Photonics (2022).

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