Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers

Clemens Schwarzer; Elvis Mujagić; Sang Il Ahn; Aaron Maxwell Andrews; Werner Schrenk; William Charles; Claire F. Gmachl; Gottfried Strasser

doi:10.1063/1.4712127

Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers

Clemens Schwarzer, Elvis Mujagić, Sang Il Ahn, Aaron Maxwell Andrews, Werner Schrenk, William Charles, Claire F. Gmachl, Gottfried Strasser

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19 Scopus citations

Abstract

We report on experimental and theoretical investigation of grating parameters to promote one specific emission direction from ring-cavity quantum cascade lasers. The devices show single-mode behavior at room temperature and pulsed operation. A maximized surface output power was found for grating duty cycles around 70%, while for substrate emission, the optimized grating duty cycle is ≈50%. All tested devices emit more power through the substrate, when accounting for absorption and the reflection at the substrate air interface.

Original language	English (US)
Article number	191103
Journal	Applied Physics Letters
Volume	100
Issue number	19
DOIs	https://doi.org/10.1063/1.4712127
State	Published - May 7 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4712127

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title = "Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers",

abstract = "We report on experimental and theoretical investigation of grating parameters to promote one specific emission direction from ring-cavity quantum cascade lasers. The devices show single-mode behavior at room temperature and pulsed operation. A maximized surface output power was found for grating duty cycles around 70%, while for substrate emission, the optimized grating duty cycle is ≈50%. All tested devices emit more power through the substrate, when accounting for absorption and the reflection at the substrate air interface.",

author = "Clemens Schwarzer and Elvis Mujagi{\'c} and Ahn, {Sang Il} and Andrews, {Aaron Maxwell} and Werner Schrenk and William Charles and Gmachl, {Claire F.} and Gottfried Strasser",

note = "Funding Information: The authors acknowledge the support by the Austrian projects IR-ON (Austrian Science Fund (FWF): F2503-N17), the Austrian Nanoinitiative project PLATON, the “Gesellschaft f{\"u}r Mikro- und Nanoelektronik” GMe, and MIRTHE (NSF-ERC, EEC 0540832). ",

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doi = "10.1063/1.4712127",

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T1 - Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers

AU - Schwarzer, Clemens

AU - Mujagić, Elvis

AU - Ahn, Sang Il

AU - Andrews, Aaron Maxwell

AU - Schrenk, Werner

AU - Charles, William

AU - Gmachl, Claire F.

AU - Strasser, Gottfried

N1 - Funding Information: The authors acknowledge the support by the Austrian projects IR-ON (Austrian Science Fund (FWF): F2503-N17), the Austrian Nanoinitiative project PLATON, the “Gesellschaft für Mikro- und Nanoelektronik” GMe, and MIRTHE (NSF-ERC, EEC 0540832).

PY - 2012/5/7

Y1 - 2012/5/7

N2 - We report on experimental and theoretical investigation of grating parameters to promote one specific emission direction from ring-cavity quantum cascade lasers. The devices show single-mode behavior at room temperature and pulsed operation. A maximized surface output power was found for grating duty cycles around 70%, while for substrate emission, the optimized grating duty cycle is ≈50%. All tested devices emit more power through the substrate, when accounting for absorption and the reflection at the substrate air interface.

AB - We report on experimental and theoretical investigation of grating parameters to promote one specific emission direction from ring-cavity quantum cascade lasers. The devices show single-mode behavior at room temperature and pulsed operation. A maximized surface output power was found for grating duty cycles around 70%, while for substrate emission, the optimized grating duty cycle is ≈50%. All tested devices emit more power through the substrate, when accounting for absorption and the reflection at the substrate air interface.

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Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers

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