Decoherence processes during optical manipulation of excitonic qubits in semiconductor quantum dots

Q. Q. Wang, A. Muller, P. Bianucci, E. Rossi, Q. K. Xue, Toshihide Takagahara, C. Piermarocchi, A. H. MacDonald, C. K. Shih

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

Using photoluminescence spectroscopy, we have investigated the nature of Rabi oscillation damping during optical manipulation of excitonic qubits in self-assembled quantum dots. Rabi oscillations were recorded by varying the pulse amplitude for fixed pulse durations between 4ps and 10ps. Up to five periods are visible, making it possible to quantify the excitation dependent damping. We find that this damping is more pronounced for shorter pulse widths and show that its origin is the nonresonant excitation of carriers in the wetting layer, most likely involving bound-to-continuum and continuum-to-bound transitions.

Original languageEnglish
Article number035306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number3
DOIs
Publication statusPublished - 2005 Jul 15
Externally publishedYes

Fingerprint

Semiconductor quantum dots
manipulators
Damping
damping
quantum dots
pulse duration
continuums
oscillations
Photoluminescence spectroscopy
pulse amplitude
wetting
excitation
Wetting
photoluminescence
spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Decoherence processes during optical manipulation of excitonic qubits in semiconductor quantum dots. / Wang, Q. Q.; Muller, A.; Bianucci, P.; Rossi, E.; Xue, Q. K.; Takagahara, Toshihide; Piermarocchi, C.; MacDonald, A. H.; Shih, C. K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 72, No. 3, 035306, 15.07.2005.

Research output: Contribution to journalArticle

Wang, Q. Q. ; Muller, A. ; Bianucci, P. ; Rossi, E. ; Xue, Q. K. ; Takagahara, Toshihide ; Piermarocchi, C. ; MacDonald, A. H. ; Shih, C. K. / Decoherence processes during optical manipulation of excitonic qubits in semiconductor quantum dots. In: Physical Review B - Condensed Matter and Materials Physics. 2005 ; Vol. 72, No. 3.
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