Rabi splitting and ac-Stark shift of a charged exciton

The Rabi splitting of the negatively charged exciton in a single InGaAs quantum dot is observed in resonance transmission spectroscopy. We use a pump laser excitation to drive strongly the unpolarized trion transition in a quantum dot and detect its modified absorption spectrum with a second weak probe laser. By tuning the pump laser near resonance, we observe an ac-Stark effect dispersion, with a power dependent Rabi splitting on resonance, both signatures of a strongly coupled two level system. Although the pump and probe laser fields are resonant with the same transition, we do not observe all features in the Mollow spectrum. We combine the results of pump probe with saturation spectroscopy data to deduce the individual contributions to the low power linewidth.

[1]  Yanwen Wu,et al.  Fast spin state initialization in a singly charged InAs-GaAs quantum dot by optical cooling. , 2007, Physical review letters.

[2]  L. J. Sham,et al.  Supporting Online Material for Coherent Optical Spectroscopy of a Strongly Driven Quantum Dot , 2007 .

[3]  Khaled Karrai,et al.  Quantum-Dot Spin-State Preparation with Near-Unity Fidelity , 2006, Science.

[4]  B. Gerardot,et al.  Absorption and photoluminescence spectroscopy on a single self-assembled charge-tunable quantum dot , 2005, cond-mat/0510728.

[5]  B. Gerardot,et al.  Voltage control of the spin dynamics of an exciton in a semiconductor quantum dot. , 2005, Physical review letters.

[6]  M. Bichler,et al.  Power broadening of the exciton linewidth in a single InGaAs∕GaAs quantum dot , 2004 .

[7]  B. Gerardot,et al.  Voltage-controlled optics of a quantum dot. , 2004, Physical review letters.

[8]  P. Petroff,et al.  Stark-shift modulation absorption spectroscopy of single quantum dots , 2003 .

[9]  K. Karrai,et al.  Optical transmission and reflection spectroscopy of single quantum dots , 2003 .

[10]  A. Zrenner,et al.  Coherent properties of a two-level system based on a quantum-dot photodiode , 2002, Nature.

[11]  Russia.,et al.  Electron spin relaxation by nuclei in semiconductor quantum dots , 2002, cond-mat/0202271.

[12]  M. Hopkinson,et al.  Observation of multicharged excitons and biexcitons in a single InGaAs quantum dot , 2001 .

[13]  F. Rossi,et al.  Quantum information processing with semiconductor macroatoms. , 2000, Physical review letters.

[14]  K. Karrai,et al.  Optical emission from a charge-tunable quantum ring , 2000, Nature.

[15]  Hansen,et al.  Spectroscopy of quantum levels in charge-tunable InGaAs quantum dots. , 1994, Physical review letters.

[16]  Frederick Y. Wu,et al.  Observation of amplification in a strongly driven two-level atomic system at optical frequencies , 1977 .

[17]  C. cohen-tannoudji,et al.  Quantum Mechanics: , 2020, Fundamentals of Physics II.

[18]  B. R. Mollow.  Stimulated Emission and Absorption near Resonance for Driven Systems , 1972 .