Coherent effects are studied in a dense atomic vapor driven by laser fields. With
optical properties dramatically modified by these effects, the medium can be used
to manipulate some of the properties of laser field. Our experiments demonstrate
the coherent control over transmission, spatial distribution and noise feature of the
laser field interacting with coherent media. The results have potential applications
in the field such as precision metrology, precision spectroscopy, optical imaging and
lithography.
We develop an experiment to investigate the atomic excitation by few-cycle radio
frequency (RF) pulses interacting with Zeeman sublevels. The system provides the
flexibility to fully control all parameters of RF pulses. Such a flexibility can not be
achieved in optical domain. Based on this system, experiments can be conducted to
simulate processes in ultra-short laser physics. In particular, we study the carrier-envelope
effect of few-cycle pulses and the strong off-resonant excitation by short
pulses.
We also discuss the selective reflection spectrum on a highly dense atomic vapor
in which the dipole-dipole interaction can not be neglected. The spectrum broadening
due to dipole-dipole interaction is much broader than the Doppler broadening. Our
experiments show that the excitation by a pump laser can reduce the dipole-dipole
interaction, thus reduce the broadening and improve the spectral resolution. The
excitation dependence is studied at various atomic densities.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2010-05-7684 |
| Date | 2010 May 1900 |
| Creators | Li, Hebin |
| Contributors | Scully, Marlan O. |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | thesis, text |
| Format | application/pdf |
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