Shortwave limit of infrared intersubband quantum cascade lasers

C. Z. Guo, S. L. Chen, Yong-Hang Zhang

Research output: Contribution to journalArticle

Abstract

The feasibility and fundamental difficulty in developing the infrared intersubband quantum cascade lasers in shorter wavelength range were discussed theoretically. The band offsets of InAs/AlSb on GaSb substrate, InAs/Al0.6Ga0.4Sb on GaSb substrate, and In0.53Ga0.47As/In0.52Al0.48As on InP substrate, and the confined states of their quantum wells with and without an applied electric field were analyzed and calculated by using the fundamental assumption of model-solid theory, strained band structure theory, empirical-two-band model for non-parabolic band, and methods of propagation matrix and laminar approach. It was found that the greatest energy difference between subband edges can not exceed 56-62% of the conduction band offset, and will be decreased further by the indirect valley. A designed structure of intersubband quantum cascade laser consisting of 250 coupled quantum wells in 25 periods under electric field 100 kV/cm for emitting the shortest wavelength 2.88 μm was proposed.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalHongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Volume20
Issue number1
StatePublished - Feb 2001
Externally publishedYes

Fingerprint

quantum cascade lasers
infrared lasers
quantum wells
electric fields
wavelengths
valleys
conduction bands
propagation
matrices
energy

Keywords

  • Band offset
  • Intersubband transition
  • Nonparabolic band
  • Quantum cascade laser

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Shortwave limit of infrared intersubband quantum cascade lasers. / Guo, C. Z.; Chen, S. L.; Zhang, Yong-Hang.

In: Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves, Vol. 20, No. 1, 02.2001, p. 1-6.

Research output: Contribution to journalArticle

@article{ec149b8398024678802a50d5bc42af0e,
title = "Shortwave limit of infrared intersubband quantum cascade lasers",
abstract = "The feasibility and fundamental difficulty in developing the infrared intersubband quantum cascade lasers in shorter wavelength range were discussed theoretically. The band offsets of InAs/AlSb on GaSb substrate, InAs/Al0.6Ga0.4Sb on GaSb substrate, and In0.53Ga0.47As/In0.52Al0.48As on InP substrate, and the confined states of their quantum wells with and without an applied electric field were analyzed and calculated by using the fundamental assumption of model-solid theory, strained band structure theory, empirical-two-band model for non-parabolic band, and methods of propagation matrix and laminar approach. It was found that the greatest energy difference between subband edges can not exceed 56-62{\%} of the conduction band offset, and will be decreased further by the indirect valley. A designed structure of intersubband quantum cascade laser consisting of 250 coupled quantum wells in 25 periods under electric field 100 kV/cm for emitting the shortest wavelength 2.88 μm was proposed.",
keywords = "Band offset, Intersubband transition, Nonparabolic band, Quantum cascade laser",
author = "Guo, {C. Z.} and Chen, {S. L.} and Yong-Hang Zhang",
year = "2001",
month = "2",
language = "English (US)",
volume = "20",
pages = "1--6",
journal = "Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves",
issn = "1001-9014",
publisher = "Chinese Optical Society",
number = "1",

}

TY - JOUR

T1 - Shortwave limit of infrared intersubband quantum cascade lasers

AU - Guo, C. Z.

AU - Chen, S. L.

AU - Zhang, Yong-Hang

PY - 2001/2

Y1 - 2001/2

N2 - The feasibility and fundamental difficulty in developing the infrared intersubband quantum cascade lasers in shorter wavelength range were discussed theoretically. The band offsets of InAs/AlSb on GaSb substrate, InAs/Al0.6Ga0.4Sb on GaSb substrate, and In0.53Ga0.47As/In0.52Al0.48As on InP substrate, and the confined states of their quantum wells with and without an applied electric field were analyzed and calculated by using the fundamental assumption of model-solid theory, strained band structure theory, empirical-two-band model for non-parabolic band, and methods of propagation matrix and laminar approach. It was found that the greatest energy difference between subband edges can not exceed 56-62% of the conduction band offset, and will be decreased further by the indirect valley. A designed structure of intersubband quantum cascade laser consisting of 250 coupled quantum wells in 25 periods under electric field 100 kV/cm for emitting the shortest wavelength 2.88 μm was proposed.

AB - The feasibility and fundamental difficulty in developing the infrared intersubband quantum cascade lasers in shorter wavelength range were discussed theoretically. The band offsets of InAs/AlSb on GaSb substrate, InAs/Al0.6Ga0.4Sb on GaSb substrate, and In0.53Ga0.47As/In0.52Al0.48As on InP substrate, and the confined states of their quantum wells with and without an applied electric field were analyzed and calculated by using the fundamental assumption of model-solid theory, strained band structure theory, empirical-two-band model for non-parabolic band, and methods of propagation matrix and laminar approach. It was found that the greatest energy difference between subband edges can not exceed 56-62% of the conduction band offset, and will be decreased further by the indirect valley. A designed structure of intersubband quantum cascade laser consisting of 250 coupled quantum wells in 25 periods under electric field 100 kV/cm for emitting the shortest wavelength 2.88 μm was proposed.

KW - Band offset

KW - Intersubband transition

KW - Nonparabolic band

KW - Quantum cascade laser

UR - http://www.scopus.com/inward/record.url?scp=0035242476&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035242476&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0035242476

VL - 20

SP - 1

EP - 6

JO - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

JF - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

SN - 1001-9014

IS - 1

ER -