Robust quantum dot state preparation via adiabatic passage with frequency-swept optical pulses

Details Robust quantum dot state preparation via adiabatic passage with frequency-swept optical pulses Robust quantum dot state preparation via adiabatic passage with frequency-swept optical pulses

2010-07-16

arxiv.org/abs/1007.2808v1

Phys. Rev. Lett. 106, 166801 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Poster at conference QD2010 Nottingham, UK (26.-30. April 2010)

Scientific paper

The energy states in semiconductor quantum dots are discrete as in atoms, and quantum states can be coherently controlled with resonant laser pulses. Long coherence times allow the observation of Rabi-flopping of a single dipole transition in a solid state device, for which occupancy of the upper state depends sensitively on the dipole moment and the excitation laser power. We report on the robust preparation of a quantum state using an optical technique that exploits rapid adiabatic passage from the ground to an excited state through excitation with laser pulses whose frequency is swept through the resonance. This observation in photoluminescence experiments is made possible by introducing a novel optical detection scheme for the resonant electron hole pair (exciton) generation.

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