Temat: 78.47.-p - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Four-Wave Mixing Spectroscopy of Quantum Dot Molecules
Autorzy:: Sitek, A.
Machnikowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/2047371.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
78.47.+p
Opis:: We study theoretically the nonlinear four-wave mixing response of an ensemble of coupled pairs of quantum dots (quantum dot molecules). We discuss the shape of the echo signal depending on the parameters of the ensemble: the statistics of transition energies and the degree of size correlations between the dots forming the molecules.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 167-172
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Long Decays of Excitonic Photoluminescence from CdTe/ZnTe Individual Quantum Dots
Autorzy:: Piechal, B.
Suffczyński, J.
Trajnerowicz, A.
Goryca, M.
Kossacki, P.
Golnik, A.
Gaj, J. A.
Powiązania:: https://bibliotekanauki.pl/articles/2044525.pdf
Data publikacji:: 2005-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.+p
78.67.Hc
78.55.Et
Opis:: We present time-resolved micro-photoluminescence study of self-assembled CdTe/ZnTe quantum dots. In addition to the fast radiative decay of the exciton, we observe long components, being of the order of a few nanoseconds. We observe that long decays are present for neutral exciton lines as well as on the biexciton ones. The temperature dependent measurements reveal the non-monotonic behaviour. We find also that the long decays are not mono-exponential. We conclude that the dark exciton states cannot be treated as the only source of long decays in the luminescence. We propose other possible explanation, which is the slowing of luminescence by carrier trapping in high energy states in quantum dots and barriers.
Źródło:: Acta Physica Polonica A; 2005, 108, 5; 831-836
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Optically Detected Microwave Resonance and Carrier Dynamics in InAs/GaAs Quantum Dots
Autorzy:: Žurauskienė, N.
Marcinkevičius, S.
Janssen, G.
Goovaerts, E.
Nötzel, R.
Koenraad, P.
Wolter, J.
Powiązania:: https://bibliotekanauki.pl/articles/1178362.pdf
Data publikacji:: 2005-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
78.47.+p
76.70.Hb
Opis:: The properties of small-sized high density InAs/GaAs quantum dots (emitting at 1.25 eV) are studied by means of optically detected microwave resonance spectroscopy and time resolved photoluminescence techniques. The results are discussed in terms of trapping and thermal escape of the carriers as well as their relaxation and recombination in quantum dots. The data are compared with those recently obtained on shallowly formed InAs quantum dot structures.
Źródło:: Acta Physica Polonica A; 2005, 107, 2; 435-439
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Femtosecond Spectral Hole Burning Spectroscopy as a Probe of Exciton Dynamics in Quantum Dots
Autorzy:: Műller, T.
Moldaschl, T.
Parz, W.
Golka, S.
Strasser, G.
Unterrainer, K.
Powiązania:: https://bibliotekanauki.pl/articles/1813185.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.21.La
78.47.-p
78.67.Hc
Opis:: We present measurements of the dynamics of photoexcited excitons in an ensemble of InAs/GaAs self-assembled quantum dots using a femtosecond spectral hole burning technique. We use this technique to examine the exciton spin relaxation and the line shape of optical transitions in the dots.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 777-782
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Control of Photon Polarization in GaAs/AlAs Single Quantum Dot Emission
Autorzy:: Suffczyński, J.
Trajnerowicz, A.
Kazimierczuk, T.
Piętka, B.
Kowalik, K.
Kossacki, P.
Golnik, A.
Nawrocki, M.
Gaj, J. A.
Wysmołek, A.
Stępniewski, R.
Potemski, M.
Thierry-Mieg, V.
Powiązania:: https://bibliotekanauki.pl/articles/2047725.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Cr
78.66.Fd
78.67.Hc
78.47.+p
Opis:: We study polarization resolved correlation between photons emitted in cascaded biexciton-exciton recombination from a single quantum dot formed in type II GaAs/AlAs bilayer. Magnetic field induced transition from anisotropy controlled to the Zeeman controlled emission was demonstrated by a circular polarization correlation between the emitted photons. A simple model describing the effect allowed us to determine the anisotropic exchange splitting of the excitonic state. This method of the anisotropic exchange splitting determination can be useful in the case when other methods are not sensitive enough.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 461-466
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Dynamics of Excitation Transfer Inside InAs/GaAs Quantum Dot System
Autorzy:: Korona, K. P.
Babiński, A.
Raymond, S.
Wasilewski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/2046919.pdf
Data publikacji:: 2006-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.47.+p
72.20.Jv
78.67.Hc
78.55.Cr
Opis:: We present time-resolved photoluminescence investigations of InAs/GaAs structures containing quantum dots with the ground state at 1.43 eV. State filling effect and a Pauli blocking effect were clearly observed. These effects significantly influenced dynamics of excitation transfer from upper to lower state inside a dot leading to non-exponential dynamics. Numerical model based on nonlinear rate equations was proposed. The model described well the experimental data providing values of: lifetime of the ground state 0.53±0.03 ns, lifetime of excited state (when the ground state is full) 1.1±0.2 ns, and internal relaxation time (when the ground state is empty) 0.07±0.01 ns.
Źródło:: Acta Physica Polonica A; 2006, 110, 2; 219-224
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 7.

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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