Title
SiGe/Si THz laser based on transitions between inverted mass light-hole and heavy-hole subbands
Document Type
Article
Publication Date
1-22-2001
Abstract
We have investigated a SiGe/Si quantum-well laser based on transitions between the light-hole and heavy-hole subbands. The lasing occurs in the region of k space where the dispersion of ground-state light-hole subband is so nonparabolic that its effective mass is inverted. This kind of lasing mechanism makes total population inversion between the two subbands unnecessary. The laser structure can be electrically pumped through tunneling in a quantum cascade scheme. Optical gain as high as 172/cm at the wavelength of 50 μm can be achieved at the temperature of liquid nitrogen, even when the population of the upper laser subband is 15% less than that of the lower subband.
Recommended Citation
Friedman, L.; Sun, Greg; and Soref, Richard A., "SiGe/Si THz laser based on transitions between inverted mass light-hole and heavy-hole subbands" (2001). Physics Faculty Publications. 28.
https://scholarworks.umb.edu/physics_faculty_pubs/28
Publisher
American Institute of Physics
Rights
Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Comments
The following article appeared in Applied Physics Letters, vol. 78, issue 4 (2001) and may be found at http://dx.doi.org/10.1063/1.1341221.
Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.