Abstract

He4 2 3S12 P3 transitions at 1083  nm were laser probed in the presence of radiation that coupled the 2 P3 level with the 3 3S1 level in a ladder scheme. The metastable helium that was used was produced in a rf discharge. Significant atomic birefringence was detected, in addition to complete electromagnetically induced transparency. A simple theoretical model explains the experimental results.

© 1997 Optical Society of America

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