Autor: Machnikowski, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Phonon-Assisted Excitation Transfer in Quantum Dot Molecules
Autorzy:: Rozbicki, E.
Machnikowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/2047376.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 63.20.Kr
73.63.Kv
Opis:: We derive a quantum-kinetic description of phonon-assisted Förster transfer between two coupled quantum dots (a quantum dot molecule). We show that the exciton state decays to the ground state of the quantum dot molecule via a combination of the Rabi rotation and exponential decay. For moderately spaced dots this process takes place on a picosecond timescale.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 197-202
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Electron States, Phonon-Assisted Relaxation and Tunneling in Self-Assembled Quantum Dot Molecules in an Electric Field
Autorzy:: Gawarecki, K.
Machnikowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/2048065.pdf
Data publikacji:: 2011-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.21.La
73.63.Kv
63.20.kd
Opis:: We present a theoretical analysis of the phonon-assisted relaxation in a system composed of two self-assembled vertically stacked quantum dots. We construct realistic model, which takes into account the geometry and strain distribution in the system. We calculate phonon-assisted relaxation rates between the two lowest states (in one- and two-electron cases). The relaxation rates and energy levels are studied as a function of external (axial) electric field and geometry of the structure (dot sizes). We show that the relaxation times can be as low as 1 ps but efficient relaxation occurs only for very finely tuned dots.
Źródło:: Acta Physica Polonica A; 2011, 119, 5; 637-639
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Phonon-Assisted Tunneling of an Electron in a Strained Self-Assembled Quantum Dot Molecule
Autorzy:: Pochwała, M.
Machnikowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/1811973.pdf
Data publikacji:: 2008-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.21.La
73.63.Kv
63.20.kd
Opis:: We calculate phonon-assisted relaxation rates in a self-assembled quantum dot molecule. The calculation is based on wave functions obtained within an envelope function approach, including strain effects. The single-phonon relaxation is shown to be efficient for separations between the dots around 10 nm when, in addition, the dots are brought close to resonance.
Źródło:: Acta Physica Polonica A; 2008, 114, 5; 1285-1291
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Collective Luminescence and Phonon-Induced Processes in Double Quantum Dots
Autorzy:: Machnikowski, P.
Roszak, K.
Sitek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1791287.pdf
Data publikacji:: 2009-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.65.Yz
78.67.Hc
03.67.Lx
71.38.-k
73.63.Kv
Opis:: We study the evolution of a quantum state of a double quantum dot system interacting with the electromagnetic environment and with the lattice modes, in the presence of a coupling between the two dots. We propose a unified approach to the simulation of the system evolution under joint impact of the two reservoirs. We discuss the sub- and superradiant radiative decay of the system, the phonon-induced decay of entanglement between the dots, and the transfer of excitation between them.
Źródło:: Acta Physica Polonica A; 2009, 116, 5; 818-825
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Phonon Effects on the Weak Measurement of Charge States in Quantum Dots with a Quantum Point Contact
Autorzy:: Marcinowski, Ł.
Krzyżosiak, M.
Machnikowski, P.
Buczko, R.
Mostowski, J.
Roszak, K.
Powiązania:: https://bibliotekanauki.pl/articles/2048072.pdf
Data publikacji:: 2011-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.63.Kv
03.65.Ta
63.20.kd
Opis:: We study theoretically the process of a weak measurement of charge states in a double quantum dot performed by coupling to a quantum point contact. We focus on the interplay of the measurement process with phonon-induced dephasing of delocalized superpositions of electron states and compare the time scales relevant for the dynamics of the open system and for the measurement process: the decoherence rate, the localization rate of the state conditioned on the measurement outcome and the time scale on which information on the system state is gained in the process of the measurement.
Źródło:: Acta Physica Polonica A; 2011, 119, 5; 640-643
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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