Valence intersubband lasers with inverted light-hole effective mass

1998 ◽  
Vol 72 (12) ◽  
pp. 1481-1483 ◽  
Author(s):  
G. Sun ◽  
Y. Lu ◽  
J. B. Khurgin
Keyword(s):  
Effective Mass ◽  
Light Hole ◽  
Hole Effective Mass

Design and Simulation of a Mid-Infrared Quantum Cascade Laser Based on Ge-Si Superlattices

2007 ◽  
Vol 121-123 ◽  
pp. 677-680
Author(s):  
Yan Wu Lu ◽  
Gregory Sun
Keyword(s):  
Effective Mass ◽  
Quantum Cascade Laser ◽  
Current Density ◽  
Population Inversion ◽  
Optical Gain ◽  
Light Hole ◽  
Mid Infrared ◽  
Hole Effective Mass ◽  
Quantum Cascade ◽  
Simple Quantum

This paper presents a novel valance intersubband laser based on Si-based Si-Ge superlattices grown on a relaxed Si0.5Ge0.5 buffer layer. Effective mass theory is used to calculate the inplane valence subband dispersion of Si-Ge superlattices within 6×6 Kane model. Analysis of the inplane energy dispersion shows that the light-hole effective mass is inverted at off zone center region. The laser structure can be designed with a simple quantum cascade scheme. Our calculation shows that with the electrical pump, it is possible to achieve population inversion between the two subbands at local k space where the light-hole effective mass is inverted. Optical gain of the order 100/cm can be achieved with a pumping current density 10 kA/cm2.

Direct evaluation of hole effective mass of SnS–SnSe solid solutions with ARPES measurement

2021 ◽  
Author(s):  
Issei Suzuki ◽  
Zexin Lin ◽  
Sakiko Kawanishi ◽  
Kiyohisa Tanaka ◽  
Yoshitaro Nose ◽  
...  
Keyword(s):  
Effective Mass ◽  
Valence Band ◽  
Thermoelectric Properties ◽  
Solid Solutions ◽  
Photoemission Spectroscopy ◽  
Direct Evaluation ◽  
Hole Effective Mass ◽  
Single Crystalline ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Effective Masses

Valence band dispersions of single-crystalline SnS1-xSex solid solutions were observed by angle-resolved photoemission spectroscopy (ARPES). The hole effective masses, crucial factors in determining thermoelectric properties, were directly evaluated. They decrease...

Structural design principles for low hole effective mass s-orbital-based p-type oxides

2017 ◽  
Vol 5 (23) ◽  
pp. 5772-5779 ◽  
Author(s):  
Viet-Anh Ha ◽  
Francesco Ricci ◽  
Gian-Marco Rignanese ◽  
Geoffroy Hautier
Keyword(s):  
Effective Mass ◽  
First Principles ◽  
Structural Design ◽  
Carrier Mobility ◽  
Design Principles ◽  
Hole Effective Mass ◽  
P Type

We demonstrate through first principles computations how the metal–oxygen–metal angle directly drives the hole effective mass (thus the carrier mobility) in p-type s-orbital-based oxides.

Theoretical search for high-performance thermoelectric donor–acceptor copolymers: the role of super-exchange couplings

2020 ◽  
Vol 8 (41) ◽  
pp. 21852-21861
Author(s):  
Xue Yong ◽  
Gang Wu ◽  
Wen Shi ◽  
Zicong Marvin Wong ◽  
Tianqi Deng ◽  
...  
Keyword(s):  
Effective Mass ◽  
Power Factor ◽  
First Principles ◽  
High Performance ◽  
First Principles Calculations ◽  
Thermoelectric Power Factor ◽  
Hole Effective Mass ◽  
Donor Acceptor ◽  
Weak Electron

First-principles calculations of a series of representing D–A copolymers demonstrated the strong Super-Exchange couplings induce not only small hole effective mass but also weak electron-phonon couplings, and eventually high thermoelectric power factor.

Comparison of Hole Effective Mass Between Various Biaxially Strained Ge Semiconductors

2015 ◽  
Vol 12 (12) ◽  
pp. 5664-5669
Author(s):  
Li Yu-Chen ◽  
Song Jian-Jun ◽  
Liu Shu-Lin ◽  
Tong Jun
Keyword(s):  
Effective Mass ◽  
Hole Effective Mass

scholarly journals Hole effective mass in strained Si1−xCx alloys

2004 ◽  
Vol 96 (9) ◽  
pp. 5037-5041 ◽  
Author(s):  
C. Y. Lin ◽  
S. T. Chang ◽  
C. W. Liu
Keyword(s):  
Effective Mass ◽  
Hole Effective Mass
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