1,740 research outputs found
Experimental observation of carrier-envelope phase effects by multicycle pulses
We present an experimental and theoretical study of carrier-envelope phase
(CEP) effects on the population transfer between two bound atomic states
interacting with pulses consisting of many cycles. Using intense
radio-frequency pulse with Rabi frequency of the order of the atomic transition
frequency, we investigated the influence of CEP on the control of phase
dependent multi-photon transitions between the Zeeman sub-levels of the ground
state of Rb. Our scheme has no limitation on the duration of the pulses.
Extending the CEP control to longer pulses creates interesting possibilities to
generate pulses with accuracy that is better then the period of optical
oscillations.Comment: 8 Pages, 6 Figure
Transverse localization and slow propagation of light
The effect of finite control beam on the transverse spatial profile of the
slow light propagation in an electromagnetically induced transparency medium is
studied. We arrive at a general criterion in terms of eigenequation, and
demonstrate the existence of a set of localized, stationary transverse modes
for the negative detuning of the probe signal field. Each of these
diffraction-free transverse modes has its own characteristic group velocity,
smaller than the conventional theoretical result without considering the
transverse spatial effect
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