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In this paper, we present an example of control system design based on negative imaginary (NI) system theory. The system under consideration is an optical cavity system. A dynamical model of the cavity system is obtained through system identification of applied to experimental input output frequency response data obtained using a digital signal analyzer (DSA). The identified model satisfies NI property...
We experimentally investigate atom-cavity transmission spectra with three-level atoms inside an optical cavity. At large cavity frequency detuning, the bright- and dark-polariton three-peak structure becomes asymmetric and the peaks can merge together to create interference.
We report on recent realization of an optical lattice clock operating on the 1S0-3P0 transition in 88Sr, at LENS laboratories. The clock transition is excited with the technique of magnetic field-induced spectroscopy. New experimental techniques has also been developed in order to simplifies the clock spectroscopy in Sr atoms. The first new method helps in the first search of the clock transition...
We study theoretically and experimentally the strongly-coupled, nonlinear regime of a hot vapor of three-level atoms in an optical cavity. Interesting effects include lasing without inversion and polariton peak splittings.
Metamaterials are artificial periodic structures. Their optical properties depend on the design of resonant elements that play the role of atoms in conventional materials. Thus novel and extraordinary properties can be achieved, among which is negative refractive index. At present negative refractive index metamaterials, or left-handed materials, were engineered in optical frequency range that enables...
We have observed photon blockade, as evidenced by the photon statistics for light transmitted by an optical cavity containing one trapped atom. The measurements also reveal the energy distribution for atomic motion in the trap.
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