High performance interminiband quantum cascade lasers with graded superlattices

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

doi:10.1063/1.122391

High performance interminiband quantum cascade lasers with graded superlattices

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

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

153 Scopus citations

Abstract

A new class of quantum cascade lasers is presented. They are based on interminiband transitions in chirped superlattices (SL), where the applied electric field is compensated by the quasielectric field resulting from a gradually varying SL period length and average composition. In this way "flat" minibands can be obtained without the need for dopants. At room temperature record high peak (0.5 W) and average (14 mW) powers are obtained for a laser of 7.6 μm wavelength, with the lowest threshold current densities (5 kA/cm²) reported so far for quantum cascade lasers. The maximum temperature for continuous wave operation is an unprecedented 160 K.

Original language	English (US)
Pages (from-to)	2101-2103
Number of pages	3
Journal	Applied Physics Letters
Volume	73
Issue number	15
DOIs	https://doi.org/10.1063/1.122391
State	Published - 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.122391

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abstract = "A new class of quantum cascade lasers is presented. They are based on interminiband transitions in chirped superlattices (SL), where the applied electric field is compensated by the quasielectric field resulting from a gradually varying SL period length and average composition. In this way {"}flat{"} minibands can be obtained without the need for dopants. At room temperature record high peak (0.5 W) and average (14 mW) powers are obtained for a laser of 7.6 μm wavelength, with the lowest threshold current densities (5 kA/cm2) reported so far for quantum cascade lasers. The maximum temperature for continuous wave operation is an unprecedented 160 K.",

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

year = "1998",

doi = "10.1063/1.122391",

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T1 - High performance interminiband quantum cascade lasers with graded superlattices

AU - Tredicucci, Alessandro

AU - Capasso, Federico

AU - Gmachl, Claire

AU - Sivco, Deborah L.

AU - Hutchinson, Albert L.

AU - Cho, Alfred Y.

PY - 1998

Y1 - 1998

N2 - A new class of quantum cascade lasers is presented. They are based on interminiband transitions in chirped superlattices (SL), where the applied electric field is compensated by the quasielectric field resulting from a gradually varying SL period length and average composition. In this way "flat" minibands can be obtained without the need for dopants. At room temperature record high peak (0.5 W) and average (14 mW) powers are obtained for a laser of 7.6 μm wavelength, with the lowest threshold current densities (5 kA/cm2) reported so far for quantum cascade lasers. The maximum temperature for continuous wave operation is an unprecedented 160 K.

AB - A new class of quantum cascade lasers is presented. They are based on interminiband transitions in chirped superlattices (SL), where the applied electric field is compensated by the quasielectric field resulting from a gradually varying SL period length and average composition. In this way "flat" minibands can be obtained without the need for dopants. At room temperature record high peak (0.5 W) and average (14 mW) powers are obtained for a laser of 7.6 μm wavelength, with the lowest threshold current densities (5 kA/cm2) reported so far for quantum cascade lasers. The maximum temperature for continuous wave operation is an unprecedented 160 K.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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High performance interminiband quantum cascade lasers with graded superlattices

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