High-performance quantum cascade lasers with electric-field-free undoped superlattice

Alessandro Tredicucci; Federico Capasso; Claire Gmachl; Deborah L. Sivco; Albert L. Hutchinson; Alfred Y. Cho

doi:10.1109/68.826907

High-performance quantum cascade lasers with electric-field-free undoped superlattice

Alessandro Tredicucci, Federico Capasso, Claire Gmachl, Deborah L. Sivco, Albert L. Hutchinson, Alfred Y. Cho

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

An optimized design of quantum cascade lasers with electric field free undoped superlattice active regions is presented. In these structures the superlattice is engineered so that: 1) the first two extended states of the upper miniband are separated by an optical phonon to avoid phonon bottleneck effects and concentrate the injected electron density in the lower state and 2) the oscillator strength of the laser transition is maximized. The injectors' doping profile is also optimized by concentrating the doping in a single quantum well to reduce the electron density in the active material. These design changes result in major improvements of the pulse/continuous-wave performance such as a weak temperature dependence of threshold (T_o = 167 K), high peak powers (100-200 mW at 300 K) and higher CW operating temperatures for devices emitting around at λ to approximately 8.5 μm.

Original language	English (US)
Pages (from-to)	260-262
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	12
Issue number	3
DOIs	https://doi.org/10.1109/68.826907
State	Published - Mar 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/68.826907

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title = "High-performance quantum cascade lasers with electric-field-free undoped superlattice",

abstract = "An optimized design of quantum cascade lasers with electric field free undoped superlattice active regions is presented. In these structures the superlattice is engineered so that: 1) the first two extended states of the upper miniband are separated by an optical phonon to avoid phonon bottleneck effects and concentrate the injected electron density in the lower state and 2) the oscillator strength of the laser transition is maximized. The injectors' doping profile is also optimized by concentrating the doping in a single quantum well to reduce the electron density in the active material. These design changes result in major improvements of the pulse/continuous-wave performance such as a weak temperature dependence of threshold (To = 167 K), high peak powers (100-200 mW at 300 K) and higher CW operating temperatures for devices emitting around at λ to approximately 8.5 μm.",

author = "Alessandro Tredicucci and Federico Capasso and Claire Gmachl and Sivco, {Deborah L.} and Hutchinson, {Albert L.} and Cho, {Alfred Y.}",

note = "Funding Information: Manuscript received August 25, 1999; revised November 15, 1999. This work was partially supported by DARPA/U.S. Army Research Office under Contract DAAG55-98-C-0050. The authors are with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. Publisher Item Identifier S 1041-1135(00)01982-0.",

year = "2000",

month = mar,

doi = "10.1109/68.826907",

language = "English (US)",

volume = "12",

pages = "260--262",

journal = "IEEE Photonics Technology Letters",

issn = "1041-1135",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "3",

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TY - JOUR

T1 - High-performance quantum cascade lasers with electric-field-free undoped superlattice

AU - Tredicucci, Alessandro

AU - Capasso, Federico

AU - Gmachl, Claire

AU - Sivco, Deborah L.

AU - Hutchinson, Albert L.

AU - Cho, Alfred Y.

N1 - Funding Information: Manuscript received August 25, 1999; revised November 15, 1999. This work was partially supported by DARPA/U.S. Army Research Office under Contract DAAG55-98-C-0050. The authors are with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. Publisher Item Identifier S 1041-1135(00)01982-0.

PY - 2000/3

Y1 - 2000/3

N2 - An optimized design of quantum cascade lasers with electric field free undoped superlattice active regions is presented. In these structures the superlattice is engineered so that: 1) the first two extended states of the upper miniband are separated by an optical phonon to avoid phonon bottleneck effects and concentrate the injected electron density in the lower state and 2) the oscillator strength of the laser transition is maximized. The injectors' doping profile is also optimized by concentrating the doping in a single quantum well to reduce the electron density in the active material. These design changes result in major improvements of the pulse/continuous-wave performance such as a weak temperature dependence of threshold (To = 167 K), high peak powers (100-200 mW at 300 K) and higher CW operating temperatures for devices emitting around at λ to approximately 8.5 μm.

AB - An optimized design of quantum cascade lasers with electric field free undoped superlattice active regions is presented. In these structures the superlattice is engineered so that: 1) the first two extended states of the upper miniband are separated by an optical phonon to avoid phonon bottleneck effects and concentrate the injected electron density in the lower state and 2) the oscillator strength of the laser transition is maximized. The injectors' doping profile is also optimized by concentrating the doping in a single quantum well to reduce the electron density in the active material. These design changes result in major improvements of the pulse/continuous-wave performance such as a weak temperature dependence of threshold (To = 167 K), high peak powers (100-200 mW at 300 K) and higher CW operating temperatures for devices emitting around at λ to approximately 8.5 μm.

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JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

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ER -

High-performance quantum cascade lasers with electric-field-free undoped superlattice

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