Quantum cascade emission in the III-nitride material system designed with effective interface grading

Alex Y. Song; Rajaram Bhat; Andrew A. Allerman; Jie Wang; Tzu Yung Huang; Chung En Zah; Claire F. Gmachl

doi:10.1063/1.4932068

Quantum cascade emission in the III-nitride material system designed with effective interface grading

Alex Y. Song, Rajaram Bhat, Andrew A. Allerman, Jie Wang, Tzu Yung Huang, Chung En Zah, Claire F. Gmachl

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19 Scopus citations

Abstract

We report the realization of quantum cascade (QC) light emission in the III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers in the quantum confinement, which alters the eigenstate system and even delocalizes the states with higher energy. Fully transverse-magnetic spontaneous emission is observed from the fabricated III-nitride QC structure, with a center wavelength of ∼4.9 μm and a full width at half maximum of ∼110 meV, both in excellent agreement with theoretical predictions. A multi-peak photo-response spectrum is also measured from the QC structure, which again agrees well with theoretical calculations and verifies the effects of EIG.

Original language	English (US)
Article number	132104
Journal	Applied Physics Letters
Volume	107
Issue number	13
DOIs	https://doi.org/10.1063/1.4932068
State	Published - Sep 28 2015

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4932068

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title = "Quantum cascade emission in the III-nitride material system designed with effective interface grading",

abstract = "We report the realization of quantum cascade (QC) light emission in the III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers in the quantum confinement, which alters the eigenstate system and even delocalizes the states with higher energy. Fully transverse-magnetic spontaneous emission is observed from the fabricated III-nitride QC structure, with a center wavelength of ∼4.9 μm and a full width at half maximum of ∼110 meV, both in excellent agreement with theoretical predictions. A multi-peak photo-response spectrum is also measured from the QC structure, which again agrees well with theoretical calculations and verifies the effects of EIG.",

author = "Song, {Alex Y.} and Rajaram Bhat and Allerman, {Andrew A.} and Jie Wang and Huang, {Tzu Yung} and Zah, {Chung En} and Gmachl, {Claire F.}",

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T1 - Quantum cascade emission in the III-nitride material system designed with effective interface grading

AU - Song, Alex Y.

AU - Bhat, Rajaram

AU - Allerman, Andrew A.

AU - Wang, Jie

AU - Huang, Tzu Yung

AU - Zah, Chung En

AU - Gmachl, Claire F.

PY - 2015/9/28

Y1 - 2015/9/28

N2 - We report the realization of quantum cascade (QC) light emission in the III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers in the quantum confinement, which alters the eigenstate system and even delocalizes the states with higher energy. Fully transverse-magnetic spontaneous emission is observed from the fabricated III-nitride QC structure, with a center wavelength of ∼4.9 μm and a full width at half maximum of ∼110 meV, both in excellent agreement with theoretical predictions. A multi-peak photo-response spectrum is also measured from the QC structure, which again agrees well with theoretical calculations and verifies the effects of EIG.

AB - We report the realization of quantum cascade (QC) light emission in the III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers in the quantum confinement, which alters the eigenstate system and even delocalizes the states with higher energy. Fully transverse-magnetic spontaneous emission is observed from the fabricated III-nitride QC structure, with a center wavelength of ∼4.9 μm and a full width at half maximum of ∼110 meV, both in excellent agreement with theoretical predictions. A multi-peak photo-response spectrum is also measured from the QC structure, which again agrees well with theoretical calculations and verifies the effects of EIG.

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Quantum cascade emission in the III-nitride material system designed with effective interface grading

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