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Published on: August 5, 2013
Spectrum of the cavity-QED microlaser: strong coupling effects in the frequency pulling at off resonance
1Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Physical Review Letters
|February 2, 2013
Summary
We observed a novel frequency shift in cavity quantum electrodynamics (CQED) microlasers, sensitive to atom numbers. This effect, driven by strong atom-cavity coupling, shows periodic changes with pumping atom increases.
Area of Science:
- Quantum optics
- Cavity quantum electrodynamics (CQED)
- Laser physics
Background:
- Microlasers are fundamental quantum optical devices.
- Atom-cavity coupling is crucial for controlling laser properties.
- Understanding frequency shifts is key to laser stability and applications.
Purpose of the Study:
- To experimentally observe and characterize the cavity-QED microlaser spectrum.
- To investigate the effect of strong atom-cavity coupling on laser frequency.
- To analyze the dependence of frequency pulling on the number of pumping atoms.
Main Methods:
- Experimental setup for cavity-QED microlaser operation.
- Precise measurement of laser spectrum under varying atom numbers.
- Analysis of frequency pulling and Rabi oscillations.
Main Results:
- First experimental observation of unconventional frequency pulling in a cavity-QED microlaser.
- Quadratic enhancement of frequency pulling with atom-cavity coupling.
- Maximal sensitivity of 2.1 kHz per atom observed.
- Periodic spectral variations linked to coherent Rabi oscillations.
Conclusions:
- Strong atom-cavity coupling significantly influences microlaser frequency spectra.
- The observed frequency pulling offers a sensitive probe for atom number and quantum effects.
- Rabi oscillations provide insights into the coherent dynamics of pumping atoms in the cavity.
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