COHERENT POPULATION TRAPPING ON THE SODIUM D-1 LINE IN HIGH MAGNETIC-FIELDS

HOLLER R RENZONI F WINDHOLZ L XU JH

R. Holler et al., COHERENT POPULATION TRAPPING ON THE SODIUM D-1 LINE IN HIGH MAGNETIC-FIELDS, Journal of the Optical Society of America. B, Optical physics, 14(9), 1997, pp. 2221-2226

33

INGLESE

Article

Optics

Journal of the Optical Society of America. B, Optical physics → ACNP

0740-3224

14

9

1997

2221 - 2226

ISI

0740-3224(1997)14:9<2221:CPTOTS>2.0.ZU;2-Q

We consider the coherent-population-trapping (CPT) phenomenon in a sod ium atomic vapor. The experiment leading to the first observation of C PT is revisited with an improved experimental setup and a larger range of magnetic-field strengths. From the analysis of the ground-state hy perfine splitting as a function of the applied magnetic field, we conc lude that we have observed the whole spectrum of dark resonances withi n the D-1 line corresponding to the nonabsorbing coherent superpositio n of two Zeeman sublevels of two different components of the 3(2)S(1/2 ) level. This was not obvious a priori because the transition probabil ities at high magnetic-field strengths, as applied in the experiment, have to be taken into account. The differences in the contrast of the various black lines are explained in terms of pumpings outside the int eraction scheme preparing the nonabsorbing state. Possible application s of CPT in high magnetic fields are discussed. (C) 1997 Optical Socie ty of America.