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Bistability of Feshbach resonance in optical cavity

100%

Xu X.-Q. , Li Y.-Q.

Open Physics

2014

tom 12

nr 6

427-432

We consider Feshbach resonance in an optical cavity where photons interact with atoms and molecules dispersively. From mean-field theory we obtain multiple fixed-point solutions, which is strongly related to the phenomenon of bistability. Adiabatic evolutions demonstrate hysteretic behaviors by varying pump-cavity detuning from opposite directions. We also use the quantum model to check mean-field results which match perfectly. The analysis here may enrich the study of particle-photon interaction systems.

Sensitive detection of NO2 with cavity enhanced spectroscopy

100%

Wojtas J. , Czyżewski A. , Stacewicz T. , Bielecki Z.

Optica Applicata

2006

tom Vol. 36, nr 4

s. 461--467

We present an experiment with nitrogen dioxide (NO2) detection with the use of cavity enhanced spectroscopy. The pulsed blue diode laser working at 414 nm as a light source was applied. The cavity was composed of two mirrrors with the reflectivity of R = 0.99992. The off-axis adjustment of the resonator was used. The absorbing gas concentration was determined by the measurement of the decay time of the light pulse trapped in the cavity. The detection limit better than 1 ppb was obtained.

Resonant Faraday effect in a Fabry–Perot cavity

100%

Sycz K. , Gawlik W. , Zachorowski J.

Optica Applicata

2010

tom Vol. 40, nr 3

633--639

A standard approach to Faraday effect in a Fabry–Perot cavity is extended to resonant absorbing media. The analysis indicates that application of the cavity improves a magnetometric sensitivity despite the resonant absorption. The degree of this improvement depends strongly on the medium’s density and is maximal for diluted media. The best effect is expected with rarified media and/or with weak optical transitions.

Optomechanical effects in superfluid properties of BEC in an optical lattice

100%

Verma P. , Bhattacherjee A. , Mohan M.

Open Physics

2013

tom 11

nr 1

96-105

We investigate the effects of a movable mirror (cantilever) of an optical cavity on the superfluid properties and the Mott phase boundary of a Bose-Einstein condensate (BEC) in an optical lattice. The Bloch energy, effective mass, Bogoliubov energy and the superfluid fraction are modified due to the mirror motion. The mirror motion is also found to modify the Mott-superfluid phase boundaries. This study reveals that the mirror emerges as a new handle to coherently control the superfluid properties of the BEC.