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06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Ultrafast coherent electron spin flip in a modulation-doped CdTe quantum well
Carey Phelps1, Timothy Sweeney, Ronald T Cox
1Department of Physics, University of Oregon, Eugene, Oregon 97403, USA.
Physical Review Letters
|August 8, 2009
Summary
We achieved coherent electron spin flip in cadmium telluride (CdTe) quantum wells using precisely tuned laser pulses. This breakthrough enables ultrafast optical control of electron spins in complex quantum systems.
Area of Science:
- Quantum physics
- Solid-state physics
- Optoelectronics
Background:
- Quantum wells are crucial for semiconductor devices.
- Controlling electron spins is key for quantum computing and spintronics.
- CdTe quantum wells offer unique spin properties.
Purpose of the Study:
- To experimentally demonstrate coherent electron spin flip in a modulation-doped CdTe quantum well.
- To develop an effective method for ultrafast optical spin control.
Main Methods:
- Utilizing off-resonant laser pulses to induce polarization-dependent optical Stark shifts.
- Designing laser pulses to avoid unwanted exciton excitations and minimize many-body effects.
Main Results:
- Achieved coherent spin rotation of electrons in CdTe quantum wells.
- Demonstrated complete electron spin flip through precise laser pulse engineering.
- Minimized detrimental many-body effects during the spin manipulation process.
Conclusions:
- Coherent electron spin flip is experimentally realized in CdTe quantum wells.
- Ultrafast optical spin control is feasible in complex spin systems.
- The developed laser pulse technique offers an effective approach for spin manipulation.
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