Autor: Sek, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Controlling the biexciton-exciton cascade kinetics in a quantum dot via coupling to a microcavity optical mode
Autorzy:: Sęk, G.
Krizhanovskii, D.
Kulakovskii, V.
Reitzenstein, S.
Kamp, M.
Powiązania:: https://bibliotekanauki.pl/articles/1160147.pdf
Data publikacji:: 2016-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
71.35.-y
78.55.-m
42.50.Pq
Opis:: The luminescence of single and two exciton states in a quantum dot embedded in the active layer of a micropillar cavity has been investigated. Temperature tuning has been used to bring the energy states of the quantum dot and the cavity into resonance. Studying the resonance behavior of the exciton and biexciton transitions with cavity mode revealed a similar Purcell effect for both lines. The cavity-induced changes of the respective radiative lifetimes have been shown to allow for controlling the ratio between the single and two exciton occupation and their relative emission rates in a single quantum dot.
Źródło:: Acta Physica Polonica A; 2016, 129, 1a; A-44-A-47
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Effect of Confinement Anisotropy on Excitonic Properties in InAs/InP Quantum Dashes
Autorzy:: Mrowiński, P.
Musiał, A.
Sęk, G.
Misiewicz, J.
Höfling, S.
Somers, A.
Hein, S.
Forchel, A.
Powiązania:: https://bibliotekanauki.pl/articles/1399087.pdf
Data publikacji:: 2013-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.35.-y
71.70.Gm
78.67.Hc
73.21.-b
81.07.Ta
Opis:: The influence of confinement potential anisotropy on emission properties of strongly elongated single InAs/InGaAlAs/InP quantum dashes has been investigated by polarization-resolved microphotoluminescence spectroscopy at around 1.5 μm. There have been determined the exciton fine structure splitting, degree of linear polarization of surface emission and biexciton binding energy. The investigated dashes exhibited usually: the exciton anisotropy splitting larger than 100 μeV, the corresponding biexciton binding energy of about 3 meV, and the degree of linear polarization values in the range from 24% to 55%. Here, we presented a correlation of these parameters for several quantum dashes, which can be attributed either to a change in lateral aspect ratio within the ensemble, or the carrier localization on random fluctuations of the dash confinement potential.
Źródło:: Acta Physica Polonica A; 2013, 124, 5; 801-804
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Effect of dielectric medium anisotropy on the polarization degree of emission from a single quantum dash
Autorzy:: Mrowiński, P.
Tarnowski, K.
Olszewski, J.
Somers, A.
Kamp, M.
Höfling, S.
Reithmaier, J.
Urbańczyk, W.
Misiewicz, J.
Machnikowski, P.
Sęk, G.
Powiązania:: https://bibliotekanauki.pl/articles/1159588.pdf
Data publikacji:: 2016-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
71.35.-y
78.55.-m
Opis:: Excitonic emission from single InAs/InGaAlAs/InP quantum dashes has been investigated in the context of degree of linear polarization by post-growth modification of its surrounding dielectric medium. We present optical spectroscopy measurements on a symmetric squared pedestal structures (mesas), and asymmetric rectangular ones oriented parallel or perpendicular to the main in-plane axis of the dashes [1-10]. Polarization resolved microphotoluminescence shows a significant quantitative modification of the degree of linear polarization value from -20% up to 70%. These results have been confronted with calculations of the coupling between the exciton transition dipole moment and electromagnetic field distributed in the vicinity of a quantum dash inside a processed mesa.
Źródło:: Acta Physica Polonica A; 2016, 129, 1a; A-48-A-52
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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