Temat: 42.50.-p - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ultrafast Phenomena in II-VI Semiconductors
Autorzy:: Kalt, H.
Wachter, S.
Lüerssen, D.
Hoffmann, J.
Powiązania:: https://bibliotekanauki.pl/articles/1968987.pdf
Data publikacji:: 1998-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.+p
42.50.Md
71.35.-y
Opis:: We review studies on the coherent and incoherent exciton dynamics in ZnSe-based quantum wells. First, the exciton-exciton scattering parameter is determined from femtosecond four-wave mixing as a function of background exciton density generated by a prepulse. A linear increase in the excitonic homogeneous linewidth is found as a function of the background exciton density with significant different scattering parameters for the cases of interaction with coherent or incoherent excitons. Second, the thermalization dynamics of spectrally narrow hot-exciton distributions is investigated by time-resolved phonon sideband spectroscopy. Thermalization assisted by acoustic phonons occurs on a 100 ps timescale, which is in good agreement with model calculations in time dependent perturbation theory.
Źródło:: Acta Physica Polonica A; 1998, 94, 2; 139-146
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Optical Pump - Terahertz Probe Measurement of the Electron Dynamics in Ga$\text{}_{1-x}$Mn$\text{}_{x}$As
Autorzy:: Šustavičiūtė, R.
Balakauskas, S.
Adomavičius, R.
Krotkus, A.
Sadowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2047687.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.65.Re
07.57.Hm
78.47.+p
75.50.Pp
Opis:: An optical pump - terahertz probe technique was used for measuring electron lifetime in various Ga$\text{}_{1-x}$Mn$\text{}_{x}$As epitaxial layers with the subpicosecond temporal resolution. The measurements were performed on the samples with x up to 2%, which had large resistivities and were transparent in a THz frequency range. It has been found that an induced THz absorption relaxation is the fastest and electron lifetimes are the shortest for the samples with the smallest Mn content. For the samples with x=0.3% and x=2% this relaxation becomes much slower; its rate is comparable to the carrier recombination rate in Ga$\text{}_{1-x}$Mn$\text{}_{x}$As substrate.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 311-314
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Coherent Manipulations in Semiconductor Nanostructures
Autorzy:: Amand, T.
Marie, X.
Renucci, P.
Vanelle, E.
Powiązania:: https://bibliotekanauki.pl/articles/2027458.pdf
Data publikacji:: 2001-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.50.Md
71.35.Ji
71.36.+c
78.47.+p
78.67.De
78.67.Hc
Opis:: This contribution presents recent results on spin manipulation by optical pulses in various semiconductor nanostructures such as quantum wells, microcavities, quantum dots. The potentialities of temporal coherent control, as well as spin dynamics under magnetic field are investigated, using the current ultrafast emission spectroscopy techniques.
Źródło:: Acta Physica Polonica A; 2001, 100, 2; 175-204
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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