Intersubband staircase laser

Nicolaus Ulbrich; Giuseppe Scarpa; Gerhard Böhm; Gerhard Abstreiter; Markus Christian Amann

doi:10.1063/1.1484245

Intersubband staircase laser

Nicolaus Ulbrich, Giuseppe Scarpa, Gerhard Böhm, Gerhard Abstreiter, Markus Christian Amann

Walter Schottky Institut

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

19 Scopus citations

Abstract

A quantum-cascade laser is presented in which the injection minibands are omitted. The intersubband laser operates as a four-level staircase and has potential for higher gain devices due to an increased confinement factor compared to conventional quantum-cascade lasers. A high threshold current density of 5.9 kA/cm² with peak output powers of 230 mW at 77 K is observed. A large wavelength shift from 9.3 to 10 μm and broadband emission are observed at higher bias fields. This modification to existing quantum-cascade laser designs has potential for higher gain devices, but problems with thermal backfilling and doping limit the operating temperature currently to 200 K.

Original language	English
Pages (from-to)	4312-4314
Number of pages	3
Journal	Applied Physics Letters
Volume	80
Issue number	23
DOIs	https://doi.org/10.1063/1.1484245
State	Published - 10 Jun 2002

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abstract = "A quantum-cascade laser is presented in which the injection minibands are omitted. The intersubband laser operates as a four-level staircase and has potential for higher gain devices due to an increased confinement factor compared to conventional quantum-cascade lasers. A high threshold current density of 5.9 kA/cm2 with peak output powers of 230 mW at 77 K is observed. A large wavelength shift from 9.3 to 10 μm and broadband emission are observed at higher bias fields. This modification to existing quantum-cascade laser designs has potential for higher gain devices, but problems with thermal backfilling and doping limit the operating temperature currently to 200 K.",

author = "Nicolaus Ulbrich and Giuseppe Scarpa and Gerhard B{\"o}hm and Gerhard Abstreiter and Amann, {Markus Christian}",

year = "2002",

month = jun,

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AU - Ulbrich, Nicolaus

AU - Scarpa, Giuseppe

AU - Böhm, Gerhard

AU - Abstreiter, Gerhard

AU - Amann, Markus Christian

PY - 2002/6/10

Y1 - 2002/6/10

N2 - A quantum-cascade laser is presented in which the injection minibands are omitted. The intersubband laser operates as a four-level staircase and has potential for higher gain devices due to an increased confinement factor compared to conventional quantum-cascade lasers. A high threshold current density of 5.9 kA/cm2 with peak output powers of 230 mW at 77 K is observed. A large wavelength shift from 9.3 to 10 μm and broadband emission are observed at higher bias fields. This modification to existing quantum-cascade laser designs has potential for higher gain devices, but problems with thermal backfilling and doping limit the operating temperature currently to 200 K.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Intersubband staircase laser

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