Level-crossing absorption with narrow spectral width in Rb vapor with buffer gas
- Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)
- Department of Physics, Chonnam National University, Gwangju 500-757 (Korea, Republic of)
We present the transformation in the Hanle configuration of the transmission that results from coherent population trapping (CPT) into the level-crossing absorption (LCA) that results from the single-photon optical pumping in the {sup 87}Rb D{sub 1} line of a Rb vapor cell with a Ne buffer gas when the polarization of the laser field is changed from linear to circular. The LCA spectrum, with a narrow spectral width of 2.4 mG (1.7 kHz), was observed in the F{sub g{yields}}F{sub e{<=}}F{sub g} transition with the circularly polarized laser. This may be because the LCA is both related to the transverse magnetic field and the atom-laser interaction time resulting from diffusive atomic motion in the cell with the buffer gas. The CPT and LCA spectra were calculated numerically using the full density matrix equations for the relevant magnetic sublevels of the hyperfine levels, considering the residual magnetic fields perpendicular to laser propagation and the collision effects resulting from the buffer gas. There was good qualitative agreement between theoretical and experimental results.
- OSTI ID:
- 21408269
- Journal Information:
- Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.023416; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ABSORPTION
ATOMS
BUFFERS
COLLISIONS
DENSITY MATRIX
INTERACTIONS
KHZ RANGE
LASER RADIATION
LASERS
MAGNETIC FIELDS
OPTICAL PUMPING
PHOTONS
POLARIZATION
RUBIDIUM 87
SPECTRA
TRAPPING
VAPORS
WIDTH
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOSONS
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FLUIDS
FREQUENCY RANGE
GASES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASSLESS PARTICLES
MATRICES
NUCLEI
ODD-EVEN NUCLEI
PUMPING
RADIATIONS
RADIOISOTOPES
RUBIDIUM ISOTOPES
SORPTION
YEARS LIVING RADIOISOTOPES