Zobrazeno 1 - 10 of 99 pro vyhledávání: '"Felix Mahler"'
1
By-Emitter Analysis of 450-nm Emitting High-Power Diode Laser Bars
Autor: Bernhard Stojetz, Jens W. Tomm, Alfred Lell, Muhammad Ali, Robert Kernke, Felix Mahler, Harald König
Publikováno v: IEEE Journal of Selected Topics in Quantum Electronics. 25:1-6
We present an analysis of optical and thermal properties of GaN-based blue-emitting high-power diode laser arrays (bars). Parameters such as emission power and temperature are monitored for each single emitter of arrays consisting of 23 emitters. The
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed96e9b630b31af2c939e40a985f9ff5
https://doi.org/10.1109/jstqe.2019.2908552
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2
On the carrier kinetics in Al(In)GaN quantum wells stressed by high current densities
Autor: Felix Mahler, Sven Einfeldt, Jan Ruschel, Jens W. Tomm, Tim Kolbe, Johannes Glaab
Publikováno v: Novel In-Plane Semiconductor Lasers XX.
We analyze changes in carrier recombination in the quantum well (QW) active region of UVB light emitting diodes. For this purpose, we established an experimental approach for in-situ characterization of aging processes by direct comparison of QW lumi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e068dd1b6f6ae788d0bfd3c21c9fffec
https://doi.org/10.1117/12.2578049
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3
Elektronická kniha
Detox-Ratgeber : Einfach, gesund und nachhaltig entgiften
Autor: Felix Mahler
Möchten Sie Ihren Körper auf sanfte und natürliche Weise entgiften? Suchen Sie nach einer einfachen, aber effektiven Methode, um mehr Energie und Wohlbefinden in Ihren Alltag zu integrieren? Dann ist dieser Ratgeber genau das Richtige für Sie! In
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4
Impact of piezoelectric fields on coherent zone-folded phonons in GaAs/AlAs superlattices
Autor: Thomas Elsaesser, Felix Mahler, Michael Woerner, Klaus Reimann, Klaus Biermann, Christos Flytzanis
Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 100 (12), pp.121302(R). ⟨10.1103/PhysRevB.100.121302⟩
The amplitude decay of folded longitudinal acoustic phonon oscillations in GaAs/AlAs superlattices grown in the [100] and [111] directions is studied as a function of carrier excitation density. Time-resolved pump-probe measurements in reflection rev
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d5b2613a8d9df96ee8199b0010ffc60
https://doi.org/10.1103/physrevb.100.121302
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5
Role of hole confinement in the recombination properties of InGaN quantum structures
Autor: Mariia Anikeeva, Jens W. Tomm, Felix Mahler, Raffaella Calarco, Tobias Schulz, Liverios Lymperakis, Caroline Chèze, Jörg Neugebauer, Martin Albrecht
Publikováno v: Scientific Reports, Vol 9, Iss 1, Pp 1-10 (2019)
Scientific Reports
We study the isolated contribution of hole localization for well-known charge carrier recombination properties observed in conventional, polar InGaN quantum wells (QWs). This involves the interplay of charge carrier localization and non-radiative tra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4688f480c9a894055f8ea71ee04779e
https://doi.org/10.1038/s41598-019-45218-8
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7
In-situ spectroscopic analysis of the recombination kinetics in UVB LEDs during their operation
Autor: Johannes Glaab, Sven Einfeldt, Tim Kolbe, Jens W. Tomm, Felix Mahler, Jan Ruschel
Publikováno v: Applied Physics Letters. 117:121104
The recombination kinetics in the quantum well (QW) active region of ultraviolet light emitting diodes have been measured in situ during device operation. Non-radiative recombination is enhanced with increasing operation time. Saturation effects allo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a198e430271f3e5fe074858050926b45
https://doi.org/10.1063/5.0018751
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9
Ultrafast carrier dynamics in AlGaN/GaN superlattices by time-dependent reflectivity measurements (Conference Presentation)
Autor: Jens W. Tomm, Thomas Elsaesser, Veit Hoffmann, Felix Mahler, Michael Woerner, Klaus Reimann, Markus Weyers
Publikováno v: Advances in Ultrafast Condensed Phase Physics.
Gallium-nitride-based structures have become more and more important in recent years. Especially InGaN/GaN multi-quantum well (MQW) structures are used for optoelectronic devices such as light emitting diodes and diode lasers in the blue and green sp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcaf20d66c26ade0ff89f65459471e0a
https://doi.org/10.1117/12.2307098
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10
Ultrafast carrier dynamics in a GaN/Al0.18Ga0.82N superlattice
Autor: Veit Hoffmann, Klaus Reimann, Michael Woerner, Markus Weyers, Thomas Elsaesser, Jens W. Tomm, Christos Flytzanis, Felix Mahler
Publikováno v: Physical Review B. 97
Relaxation processes of photoexcited carriers in a $\mathrm{GaN}/{\mathrm{Al}}_{0.18}{\mathrm{Ga}}_{0.82}\mathrm{N}$ superlattice are studied in femtosecond spectrally resolved reflectivity measurements at ambient temperature. The transient reflectiv
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bfcb3cf6dcc3b5304b65d9820dc0c1d5
https://doi.org/10.1103/physrevb.97.161303
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