1. Electrically injected GeSn lasers on Si operating up to 100 K
- Author
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Greg Sun, Solomon Ojo, Yuanhao Miao, Joe Margetis, Gregory J. Salamo, Yiyin Zhou, Shui-Qing Yu, Jifeng Liu, Joshua M. Grant, Richard A. Soref, Baohua Li, Yong-Hang Zhang, Huong Tran, John Tolle, Wei Du, Sylvester Amoah, and Grey Abernathy
- Subjects
Materials science ,business.industry ,Heterojunction ,Laser ,Material development ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Laser linewidth ,law ,Optoelectronics ,Quantum efficiency ,Photonics ,business ,Lasing threshold ,Diode - Abstract
Monolithic lasers on Si have long been anticipated as an enabler of full photonic integration, and significant progress in GeSn material development shows promise for such laser devices. While there are many reports focused on optically pumped lasers, in this work, we demonstrate electrically injected GeSn lasers on Si. We grew a GeSn/SiGeSn heterostructure diode on a Si substrate in a ridge waveguide laser device and tested it under pulsed conditions, giving consideration to the structure design to enhance the carrier and optical confinement. The peak linewidth of 0.13 nm (0.06 meV) and injection current curves indicated lasing, which was observed up to 100 K with emission peaks at 2300 nm. We recorded a threshold of 598 A / c m 2 at 10 K. The peak power and external quantum efficiency were 2.7 mW/facet and 0.3%, respectively. The results indicate advances for group-IV-based lasers, which could serve as a promising route for laser integration on Si.
- Published
- 2020
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