Three-level Λ atom in the field of frequency-chirped bichromatic laser pulses: Writing and storage of optical phase information

G. Djotyan, J. Bakos, Zs Sörlei

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Abstract

We investigate the behavior of a three-level atomic system with Λ structure of levels in the field of a sequence of short frequency-chirped bichromatic laser pulses (BLP’s) in the adiabatic passage regime of interaction. We show that the efficiency of the population transfer in this atomic system is sensitive to the relative phase of the pulses forming the BLP when the atom is prepared in a coherent superposition of its two ground states initially. We propose to use this sensitivity for coherent fast and robust writing and reading of optical phase information. The initial preparation of the atom in the “dark” superposition state is suggested through the action of a sequence of a few frequency-chirped BLP’s with duration longer than the atomic relaxation time.

Original languageEnglish
Number of pages1
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume64
Issue number1
DOIs
Publication statusPublished - Jan 1 2001

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pulses
lasers
atoms
relaxation time
preparation
ground state
sensitivity
interactions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

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AB - We investigate the behavior of a three-level atomic system with Λ structure of levels in the field of a sequence of short frequency-chirped bichromatic laser pulses (BLP’s) in the adiabatic passage regime of interaction. We show that the efficiency of the population transfer in this atomic system is sensitive to the relative phase of the pulses forming the BLP when the atom is prepared in a coherent superposition of its two ground states initially. We propose to use this sensitivity for coherent fast and robust writing and reading of optical phase information. The initial preparation of the atom in the “dark” superposition state is suggested through the action of a sequence of a few frequency-chirped BLP’s with duration longer than the atomic relaxation time.

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