Coherent coupling of ring cavity surface emitting quantum cascade lasers

Clemens Schwarzer; Elvis Mujagić; Yu Yao; Werner Schrenk; Jianxin Chen; Claire F. Gmachl; Gottfried Strasser

doi:10.1063/1.3479913

Coherent coupling of ring cavity surface emitting quantum cascade lasers

Clemens Schwarzer, Elvis Mujagić, Yu Yao, Werner Schrenk, Jianxin Chen, Claire F. Gmachl, Gottfried Strasser

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5 Scopus citations

Abstract

We present investigations on coherent coupling of surface emitting quantum cascade lasers (QCLs). For this purpose, the evanescent field coupling method is exploited under incorporation of a ring cavity surface emitting QCL pair with an emission wavelength of ≈8 μm. A series of these pairs with intercavity separations of 1 and 3 μm was fabricated. The coupling gap of 1 μm yields robust phase-locked light source pairs with coherent emission at all injection currents and a corresponding threshold current density of 2.65 kA/cm² at room-temperature.

Original language	English (US)
Article number	071103
Journal	Applied Physics Letters
Volume	97
Issue number	7
DOIs	https://doi.org/10.1063/1.3479913
State	Published - Aug 16 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3479913

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title = "Coherent coupling of ring cavity surface emitting quantum cascade lasers",

abstract = "We present investigations on coherent coupling of surface emitting quantum cascade lasers (QCLs). For this purpose, the evanescent field coupling method is exploited under incorporation of a ring cavity surface emitting QCL pair with an emission wavelength of ≈8 μm. A series of these pairs with intercavity separations of 1 and 3 μm was fabricated. The coupling gap of 1 μm yields robust phase-locked light source pairs with coherent emission at all injection currents and a corresponding threshold current density of 2.65 kA/cm2 at room-temperature.",

author = "Clemens Schwarzer and Elvis Mujagi{\'c} and Yu Yao and Werner Schrenk and Jianxin Chen and Gmachl, {Claire F.} and Gottfried Strasser",

note = "Funding Information: The authors acknowledge the support by the Austrian projects IR-ON and ADLIS, the Austrian Nanoinitiative PLATON, MIRTHE (NSF-ERC) and the NYSTAR award. We also thank Markus Schinnerl for his support on the scanning electron microscope. ",

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doi = "10.1063/1.3479913",

language = "English (US)",

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TY - JOUR

T1 - Coherent coupling of ring cavity surface emitting quantum cascade lasers

AU - Schwarzer, Clemens

AU - Mujagić, Elvis

AU - Yao, Yu

AU - Schrenk, Werner

AU - Chen, Jianxin

AU - Gmachl, Claire F.

AU - Strasser, Gottfried

N1 - Funding Information: The authors acknowledge the support by the Austrian projects IR-ON and ADLIS, the Austrian Nanoinitiative PLATON, MIRTHE (NSF-ERC) and the NYSTAR award. We also thank Markus Schinnerl for his support on the scanning electron microscope.

PY - 2010/8/16

Y1 - 2010/8/16

N2 - We present investigations on coherent coupling of surface emitting quantum cascade lasers (QCLs). For this purpose, the evanescent field coupling method is exploited under incorporation of a ring cavity surface emitting QCL pair with an emission wavelength of ≈8 μm. A series of these pairs with intercavity separations of 1 and 3 μm was fabricated. The coupling gap of 1 μm yields robust phase-locked light source pairs with coherent emission at all injection currents and a corresponding threshold current density of 2.65 kA/cm2 at room-temperature.

AB - We present investigations on coherent coupling of surface emitting quantum cascade lasers (QCLs). For this purpose, the evanescent field coupling method is exploited under incorporation of a ring cavity surface emitting QCL pair with an emission wavelength of ≈8 μm. A series of these pairs with intercavity separations of 1 and 3 μm was fabricated. The coupling gap of 1 μm yields robust phase-locked light source pairs with coherent emission at all injection currents and a corresponding threshold current density of 2.65 kA/cm2 at room-temperature.

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Coherent coupling of ring cavity surface emitting quantum cascade lasers

Abstract

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