Zobrazeno 1 - 10
of 17
pro vyhledávání: '"L. K. Hoffmann"'
Autor:
E. Mujagić, S. Schartner, L. K. Hoffmann, D. Andrijasević, M. Nobile, H. Detz, W. Schrenk, M. P. Semtsiv, W. T. Masselink, G. Strasser, Marília Caldas, Nelson Studart
Publikováno v:
ResearcherID
We describe the fabrication and operation of quantum cascade ring lasers providing grating‐coupled surface emission. The devices exhibit tunable far fields, ranging from spot‐ to ring‐shaped symmetric beam cross sections, depending on the grati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0461f7b7effcc80bc10cd558163af4a6
https://doi.org/10.1063/1.3295520
https://doi.org/10.1063/1.3295520
Autor:
L. K. Hoffmann, C. A. Hurni, S. Schartner, E. Mujagić, W. Schrenk, A. M. Andrews, P. Klang, M. P. Semtsiv, W. T. Masselink, G. Strasser, Marília Caldas, Nelson Studart
Publikováno v:
AIP Conference Proceedings.
We present a coherent coupling scheme for mid‐infrared quantum cascade lasers. Based on far field analysis, fundamental lateral modes are realized in Y‐coupled resonators, which are locked in phase. The concept enhances the output power of a sing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::664f1851f2c50b7c00f59e861a1b200e
https://doi.org/10.1063/1.3295540
https://doi.org/10.1063/1.3295540
Autor:
Gottfried Strasser, Matthias Klinkmüller, Mykhaylo P. Semtsiv, William Ted Masselink, E. Mujagić, L. K. Hoffmann, Werner Schrenk
Publikováno v:
2009 IEEE International Conference on Indium Phosphide & Related Materials.
A monolithic coupling scheme for mid-infrared InP-based quantum cascade laser arrays is presented. The tree-shaped resonator exhibits phase-locking, which leads to in-phase emission from the coupled branches and a high level of modal control
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d43417a4e63f6852987d8ef4ab896dce
https://doi.org/10.1109/iciprm.2009.5012482
https://doi.org/10.1109/iciprm.2009.5012482
Autor:
E. Mujagić, Gottfried Strasser, Matthias Klinkmüller, Mykhaylo P. Semtsiv, Werner Schrenk, William Ted Masselink, L. K. Hoffmann
Publikováno v:
Optics express. 17(2)
A monolithic coupling scheme for mid-infrared quantum cascade laser arrays is investigated with respect to brightness enhancement. The tree-shaped resonator enables parallel coupling of six laser elements into a single element by means of several Y-j
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::319afe96ed0e23a8c7e7bd9f569f0ddf
https://pubmed.ncbi.nlm.nih.gov/19158878
https://pubmed.ncbi.nlm.nih.gov/19158878
Autor:
Gottfried Strasser, S. Schartner, L. K. Hoffmann, M. Austerer, William Ted Masselink, Mykhaylo P. Semtsiv, W. Schrenk, Christophe A. Hurni, M. Nobile, E. Mujagić, Aaron Maxwell Andrews
Publikováno v:
Springer Proceedings in Physics ISBN: 9781402084249
ResearcherID
ResearcherID
Y-coupled cavity quantum cascade lasers have been processed from GaAs/AlGaAs and InP/InGaAs/AlAs/AlInAs wafers. Farfields of these samples were investigated. A phase coherence between the two coupled ridges was observed which results in the farfield
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ba5e2b1e217cd21df7426aac065cbf5
https://doi.org/10.1007/978-1-4020-8425-6_35
https://doi.org/10.1007/978-1-4020-8425-6_35
Autor:
M. Austerer, William Ted Masselink, Gottfried Strasser, Mykhaylo P. Semtsiv, Pavel Klang, S. Schartner, M. Nobile, E. Mujagić, Werner Schrenk, I. Bayrakli, L. K. Hoffmann
Publikováno v:
Springer Proceedings in Physics ISBN: 9781402084249
The authors present the effect of injector doping concentrations between 0.7 × 1016 cm−3 and 3.9 × 1017 cm−3 on the performance of short-wavelength InP-based quantum-cascades lasers (QCL) emitting around 3.8 μm. For the maximum operation curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c6d9a2d62c84e20ca8dbc4a3d3a155b
https://doi.org/10.1007/978-1-4020-8425-6_36
https://doi.org/10.1007/978-1-4020-8425-6_36
Autor:
S. Schartner, Gottfried Strasser, W. Schrenk, E. Mujagić, P. Klang, Aaron Maxwell Andrews, William Ted Masselink, Christophe A. Hurni, M. Nobile, L. K. Hoffmann, M. Austerer, Mykhaylo P. Semtsiv
Publikováno v:
SPIE Proceedings.
A monolithic coupling scheme in which two active waveguides merge into a single waveguide to form a Y-shaped resonator is demonstrated for mid-infrared quantum cascade lasers. Lasers with emission wavelengths of 10.5 μm and 4.2 μm were processed fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0263b6f15d0a234e2a31caa500c0851a
https://doi.org/10.1117/12.773352
https://doi.org/10.1117/12.773352
Autor:
C. Deutsch, Gottfried Strasser, Karl Unterrainer, P. Klang, W. Schrenk, Alexander Benz, L. K. Hoffmann, Aaron Maxwell Andrews, Gernot Fasching
Publikováno v:
Journal of Applied Physics. 105:122404
We present the design and fabrication of photonic crystal (PhC) based resonators for terahertz quantum-cascade laser with a gain maximum at 2.7 THz. The PhC provides the confinement in lateral direction, for the vertical confinement a double-metal wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3006f451e379a30acc8826214ab498d1
https://doi.org/10.1063/1.3117229
https://doi.org/10.1063/1.3117229
Autor:
Mykhaylo P. Semtsiv, W. Schrenk, E. Mujagić, Martin Wienold, William Ted Masselink, L. K. Hoffmann, Gottfried Strasser, M. Nobile, S. Schartner
Publikováno v:
Applied Physics Letters. 93:161101
We describe the fabrication and operation of surface emitting second-order distributed feedback quantum cascade ring lasers. The devices exhibit single-mode emission at a wavelength of 3.95μm with a side mode suppression ratio of 25dB. A linear tuni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b1282dee3a7cbc68bc9ffc012d058f0
https://doi.org/10.1063/1.3000630
https://doi.org/10.1063/1.3000630
Autor:
P. Klang, Aaron Maxwell Andrews, M. Austerer, L. K. Hoffmann, Gottfried Strasser, W. Schrenk, E. Mujagić
Publikováno v:
Journal of Applied Physics. 104:063110
A midinfrared quantum cascade laser with Mach–Zehnder cavity and split contacts is investigated with respect to interference effects. By increasing the temperature in one of the two coupled active waveguides, the value of the effective refractive i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9af2317e789ba370b69a44be4be4d41a
https://doi.org/10.1063/1.2980340
https://doi.org/10.1063/1.2980340