Simultaneous electromagnetically induced transparency for two circularly polarized lasers coupled to the same linearly polarized laser in a four-level atomic system in the W scheme

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033804· OSTI ID:21541361

Bahrim, Cristian; Nelson, Chris ^[1]

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1. Department of Physics, Lamar University, P.O. Box 10046, Beaumont, Texas 77710 (United States)

Electromagnetic induced transparency (EIT) can be produced in a four-level atomic system in the W scheme using a linearly polarized optical field for simultaneously slowing down two {sigma}{sup +} and {sigma}{sup -} circularly polarized optical fields. This four-level atomic system can be set up with a |{sup 1}S{sub 0}> ground state and three Zeeman levels of the |{sup 1}P{sub 1}> excited state of any alkali-metal atom placed in a weak magnetic field. We apply our W scheme to ultracold magnesium atoms for neglecting the collisional dephasing. Atomic coherences are reported after solving a density matrix master equation including radiative relaxations from Zeeman states of the |{sup 1}P{sub 1}> multiplet to the |{sup 1}S{sub 0}> ground state. The EIT feature is analyzed using the transit time between the normal dispersive region and the EIT region. The evolution of the EIT feature with the variation of the coupling field is discussed using an intuitive dressed-state representation. We analyze the sensitivity of an EIT feature to pressure broadening of the excited Zeeman states.

• OSTI ID: 21541361
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033804; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALI METALS
ATOMS
COUPLING
DENSITY MATRIX
FIELD THEORIES
LASER RADIATION
MAGNESIUM
MAGNETIC FIELDS
OPACITY
PHOTON BEAMS
POLARIZED BEAMS
RELAXATION
SENSITIVITY
SLOWING-DOWN
ZEEMAN EFFECT
ALKALINE EARTH METALS
BEAMS
ELECTROMAGNETIC RADIATION
ELEMENTS
MATRICES
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS