Anomalous temperature dependence of excitation transfer between quantum dots

0455683 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Král, Karel - Menšík, Miroslav
Anomalous temperature dependence of excitation transfer between quantum dots.
Advanced Science, Engineering and Medicine. Roč. 7, č. 4 (2015), 325-330. ISSN 2164-6627
Grant CEP: GA MŠMT(CZ) LD14011; GA MŠMT LH12236; GA MŠMT LH12186
Institucionální podpora: RVO:68378271 ; RVO:61389013
Klíčová slova: excitation transfer * quantum dots * temperature dependence * electron-phonon interaction
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Electronic excitation energy transfer is studied theoretically within an example system of quantum dots. We use an excitonic representation of the electronic states of two quasi-zero dimensional subsystems, between which the excitation energy is transferred in a process treated as an irreversible quantum kinetic phenomenon. The electron–phonon interaction, which we include in an approximation going beyond the limits of finite order perturbation calculation, is used for considering the so called uphill and downhill excitation transfer processes. The theory of the rate is developed in a model of electronic systems of two quantum dots, both coupled to their atomic vibrations environments. The theoretical approach is documented with numerical calculations. The results should be relevant to various cases of the electronic excitation energy transfer between quasi-zero-dimensional nanostructures.
Trvalý link: http://hdl.handle.net/11104/0256299