Zobrazeno 1 - 10
of 201
pro vyhledávání: '"R, Woscholski"'
Akademický článek
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Autor:
M. Wiemer, Kerstin Volz, M. Zimprich, Arash Rahimi-Iman, Martin Koch, Wolfgang Stolz, S. Reinhard, R. Woscholski, K. Jandieri, Mohammad Khaled Shakfa, S. Gies, S. D. Baranovskii, Wolfram Heimbrodt
Publikováno v:
Thin Solid Films. 613:55-58
Time-resolved photoluminescence (TR-PL) spectroscopy has been used to study the impact of rapid thermal annealing (RTA) on the optical properties and carrier dynamics in Ga(NAsP) multiple quantum well heterostructures (MQWHs) grown on silicon substra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ab5d9eb1ae4d227c5fda65c79e228cd
https://doi.org/10.1016/j.tsf.2015.10.062
https://doi.org/10.1016/j.tsf.2015.10.062
Autor:
M. Wiemer, K. Jandieri, Kerstin Volz, Wolfgang Stolz, P. Ludewig, S. D. Baranovskii, Martin Koch, Mohammad Khaled Shakfa, R. Woscholski, S. Gies, T. Wegele, Wolfram Heimbrodt
Publikováno v:
Superlattices and Microstructures. 93:67-72
Time-resolved photoluminescence (TR-PL) measurements have been performed in Ga(NAsP)/(BGa)(AsP) multi-quantum well heterostructures (MQWHs) with different well thicknesses. The studied structures have been pseudomorphically grown on Si substrates by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3507e0a18f59ff35403e79c13f7d6f4f
https://doi.org/10.1016/j.spmi.2016.03.002
https://doi.org/10.1016/j.spmi.2016.03.002
Autor:
Benjamin Ewers, A. C. Klettke, H. M. Gibbs, Sangam Chatterjee, Galina Khitrova, Martin Koch, S. W. Koch, N. S. Köster, Mackillo Kira, R. Woscholski
Publikováno v:
physica status solidi c. 10:1226-1229
We investigate the interaction of strong single-cycle THz-pulses with a coherent excitonic polarization. The initial bleaching is superimposed by a splitting of the 1s exciton resonance and eventually is accompanied by the emergence of side-bands on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f2b3d1545fef0c6d2f0f53adf290fc4
https://doi.org/10.1002/pssc.201200722
https://doi.org/10.1002/pssc.201200722
Autor:
R. Woscholski, Emanuele Grilli, E. Gatti, Giovanni Isella, Pengki Li, Hanan Dery, Christoph Lange, Dhara Trivedi, Sangam Chatterjee, F. Ciccacci, Yang Song, Fabio Pezzoli, Stefano Cecchi, Mario Guzzi, Anna Giorgioni, Federico Bottegoni, N. S. Köster, Alberto Ferrari
Publikováno v:
ECS Transactions. 50:831-836
Ge is emerging as an interesting material for spintronic applications. We demonstrate that in SiGe heterostructures strain and quantum confinement effects can be used to tailor spin related properties enhancing the spin polarization of injected carri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5a737c97e41c4fee3b1f038f54bc785
https://doi.org/10.1149/05009.0831ecst
https://doi.org/10.1149/05009.0831ecst
Akademický článek
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Publikováno v:
Physical Review B. 90
We present a paper based on combining four-wave mixing and strong fields in the terahertz frequency range to monitor the time evolution of a disturbed excitonic polarization in a multiple quantum well system. Our findings not only confirm a lower fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af6c81695c73369e6e8770de328c387a
https://doi.org/10.1103/physrevb.90.195304
https://doi.org/10.1103/physrevb.90.195304
Autor:
E. Gatti, A Giorgioni, Emanuele Grilli, K. Kolata, Alexey Chernikov, Daniel Chrastina, Mario Guzzi, N. S. Köster, Sangam Chatterjee, Giovanni Isella, V. Bornwasser, R. Woscholski
Publikováno v:
AIP Conference Proceedings.
The carrier dynamics that occurs in Ge/SiGe QWs when electrons are excited to confined states at Gamma is studied by means of optical spectroscopy at different lattice temperatures. The typical times for the different relaxation and recombination pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6e97f112f9f0a54de0d6f3f15a71d7e
https://doi.org/10.1063/1.4848489
https://doi.org/10.1063/1.4848489
Autor:
Fabio Pezzoli, Christoph Lange, Sangam Chatterjee, R. Woscholski, John E. Sipe, Sebastian Imhof, Daniel Chrastina, K. Kolata, Angela Thränhardt, N. S. Köster, Giovanni Isella, Stefano Cecchi
We use fs-pump white-light-supercontinuum probe spectroscopy with appropriate polarization configurations to investigate the hole spin and hole cooling dynamics in Germanium quantum wells in the vicinity of the Γ valley. We observe heavy hole spin f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e549a22016299a00fc4c4446081016f3
http://hdl.handle.net/10281/43465
http://hdl.handle.net/10281/43465
Autor:
Arash Rahimi-Iman, R. Woscholski, Martin Koch, P. Ludewig, K. Jandieri, S. Reinhard, Wolfram Heimbrodt, S. Gies, M. Wiemer, Kerstin Volz, M. K. Shakfa, Wolfgang Stolz, S. D. Baranovskii
Publikováno v:
Journal of Applied Physics. 119:145707
We have studied the optical properties of Ga(NAsP)-heterostructures, which were systematically grown at different temperatures by means of continuous-wave and time-resolved photoluminescence. We show that both the long ranged and the short ranged dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::847f5ebb1e279acc65ca2a87ed5c2c50
https://doi.org/10.1063/1.4945434
https://doi.org/10.1063/1.4945434