We present a suspended SiGeSn microring laser design that enables strain relaxation of the material layer stack, electrical pumping and adequate heat sinking. Using both strain and composition as two degrees of freedom to engineer the band structure, a direct bandgap is obtained in the gain material of a double heterostructure layer stack, and the L- to Γ-valley energy difference increased to 78 meV, by 66% compared to a non-underetched structure. The temperature dependent current threshold is modeled for the designed device and determined to be 18 kA/cm2 at 50 K. The fabrication process is outlined and first experimental electroluminescence results indicating the effectiveness of our approach are reported. At the time this proceedings paper is being submitted, electrically pumped lasing has also been achieved with a similar structure, with results that will be reported in a future publication.
Description
Modeling and design of an electrically pumped SiGeSn microring laser
%0 Conference Paper
%1 Marzban_2022
%A Marzban, Bahareh
%A Seidel, Lukas
%A Kiyek, Vivien
%A Liu, Teren
%A Zöllner, Marvin
%A Ikonic, Zoran
%A Capellini, Giovanni
%A Buca, Dan
%A Schulze, Jörg
%A Oehme, Michael
%A Witzens, Jeremy
%B Silicon Photonics XVII
%D 2022
%E Reed, Graham T.
%E Knights, Andrew P.
%I SPIE
%K iht journal professional_meetings
%R 10.1117/12.2609537
%T Modeling and design of an electrically pumped SiGeSn microring laser
%U https://doi.org/10.1117%2F12.2609537
%X We present a suspended SiGeSn microring laser design that enables strain relaxation of the material layer stack, electrical pumping and adequate heat sinking. Using both strain and composition as two degrees of freedom to engineer the band structure, a direct bandgap is obtained in the gain material of a double heterostructure layer stack, and the L- to Γ-valley energy difference increased to 78 meV, by 66% compared to a non-underetched structure. The temperature dependent current threshold is modeled for the designed device and determined to be 18 kA/cm2 at 50 K. The fabrication process is outlined and first experimental electroluminescence results indicating the effectiveness of our approach are reported. At the time this proceedings paper is being submitted, electrically pumped lasing has also been achieved with a similar structure, with results that will be reported in a future publication.
@inproceedings{Marzban_2022,
abstract = {We present a suspended SiGeSn microring laser design that enables strain relaxation of the material layer stack, electrical pumping and adequate heat sinking. Using both strain and composition as two degrees of freedom to engineer the band structure, a direct bandgap is obtained in the gain material of a double heterostructure layer stack, and the L- to Γ-valley energy difference increased to 78 meV, by 66% compared to a non-underetched structure. The temperature dependent current threshold is modeled for the designed device and determined to be 18 kA/cm2 at 50 K. The fabrication process is outlined and first experimental electroluminescence results indicating the effectiveness of our approach are reported. At the time this proceedings paper is being submitted, electrically pumped lasing has also been achieved with a similar structure, with results that will be reported in a future publication.},
added-at = {2022-03-16T09:15:39.000+0100},
author = {Marzban, Bahareh and Seidel, Lukas and Kiyek, Vivien and Liu, Teren and Zöllner, Marvin and Ikonic, Zoran and Capellini, Giovanni and Buca, Dan and Schulze, Jörg and Oehme, Michael and Witzens, Jeremy},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2109645cf7ca768304a43cc7e6d0e55f9/ihtpublikation},
booktitle = {Silicon Photonics {XVII}},
description = {Modeling and design of an electrically pumped SiGeSn microring laser},
doi = {10.1117/12.2609537},
editor = {Reed, Graham T. and Knights, Andrew P.},
interhash = {82a74af3e8dbc630adc6e4cdbacdaa27},
intrahash = {109645cf7ca768304a43cc7e6d0e55f9},
keywords = {iht journal professional_meetings},
month = mar,
publisher = {{SPIE}},
timestamp = {2022-03-16T08:15:39.000+0100},
title = {Modeling and design of an electrically pumped SiGeSn microring laser},
url = {https://doi.org/10.1117%2F12.2609537},
year = 2022
}
