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Dynamic Stark effect in strongly coupled microcavity exciton polaritons
Alex Hayat1, Christoph Lange, Lee A Rozema
1Department of Physics, Centre for Quantum Information and Quantum Control, and Institute for Optical Sciences, University of Toronto, Toronto, Ontario M5S 1A7, Canada.
Physical Review Letters
|August 7, 2012
Summary
We observed a dynamic Stark shift in quantum well exciton polaritons, a key solid-state phenomenon. This effect enables ultrafast control of polariton condensates, similar to cold-atom systems.
Area of Science:
- Solid-state physics
- Quantum optics
- Materials science
Background:
- Exciton polaritons in microcavities exhibit complex collective phenomena.
- Understanding light-matter interactions is crucial for quantum technologies.
Purpose of the Study:
- To experimentally observe and characterize the nonresonant dynamic Stark shift in strongly coupled quantum well exciton polaritons.
- To explore the potential of this effect for manipulating polariton condensates.
Main Methods:
- Femtosecond pump-probe spectroscopy was employed.
- Experiments were conducted on a GaAs/AlGaAs system at 10 K.
Main Results:
- A blueshift of the meV scale was observed for specific pump fluences and detuning.
- The energy level structure of the polariton Rabi doublet remained unaffected.
- Experimental results showed good agreement with theoretical predictions.
Conclusions:
- The nonresonant dynamic Stark shift is experimentally demonstrated in exciton polaritons.
- This effect offers a novel method for generating ultrafast, density-independent potentials.
- It provides a powerful tool for imprinting phase profiles and manipulating polariton condensates.
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