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Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control

Title data

Axt, Vollrath M. ; Machnikowski, Paweł ; Kuhn, Tilmann:
Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control.
In: Physical Review B. Vol. 71 (2005) Issue 15 . - No. 155305, 9 Seiten.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.71.155305

Project information

Project financing: Alexander von Humboldt-Stiftung
Polish KBN Grant No. PB 2 PO3B085 25.

Abstract in another language

We study the phonon-induced dephasing of the exciton state in a quantum dot excited by a sequence of ultrashort pulses. We show that the multiple-pulse control leads to a considerable improvement of the coherence of the optically excited state. For a fixed control time window, the optimized pulsed control often leads to a higher degree of coherence than the control by a smooth, single Gaussian pulse. The reduction of dephasing is considerable already for 2–3 pulses.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; non-linear optics; ultrafast dynamics; pure dephasing; phonons; excitons; coherent control; damping of Rabi oscillations; decoherence; control of decoherence; non-Markovian dynamics; memory effects; laser induced dynamics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 23 Oct 2017 11:01
Last Modified: 30 Oct 2017 09:54
URI: https://eref.uni-bayreuth.de/id/eprint/40123