Search results for " INDUCED TRANSPARENCY"

showing 2 items of 22 documents

Free-space delay lines and resonances with ultraslow pulsed Bessel beams

2008

We investigate the ultraslow motion of polychromatic Bessel beams in unbounded, nondispersive media. Control over the group velocity is exercised by means of the angular dispersion of pulsed Bessel beams of invariant transverse spatial frequency, which spontaneously emerge from near-field generators. Temporal dynamics in transients and resonances over homogeneous delay lines (dielectric slabs) are also examined.

Physicsbusiness.industryElectromagnetically induced transparencyWave propagationPhysics::OpticsFísica01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materials010309 opticssymbols.namesakeOptics0103 physical sciencessymbolsBessel beamGroup velocityComputer Vision and Pattern RecognitionSpatial frequency010306 general physicsbusinessRefractive indexDiffraction gratingBessel function
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Electromagnetically induced transparency in Doppler-broadened three-level systems with resonant standing wave drive

2005

Summary form only given. Electromagnetically induced transparency (EIT) and related phenomena such as lasing without inversion (LWI) are topics of increasing interest in quantum optics. In EIT, an otherwise absorbing medium is made transparent to a weak coherent field on resonance with a certain atomic transition by applying an intense coherent "driving" field to an adjacent transition. There has been a large number of theoretical papers and EIT was demonstrated experimentally. Up to now, most theoretical papers dealing with EIT in gas media have considered only the case of a traveling (TW) driving field. In contrast, we study EIT in Doppler broadened three-level media with standing wave (S…

Quantum opticsPhysicsField (physics)Electromagnetically induced transparencybusiness.industryPhysics::OpticsResonanceStanding wavesymbols.namesakeOpticssymbolsAstrophysics::Solar and Stellar AstrophysicsFocus (optics)businessDoppler effectDoppler broadeningConference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504)
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