Observation of the quantum interference phenomenon induced by interacting dark resonances

Y. C. Chen*, Y. A. Liao, H. Y. Chiu, Jung-Jung Su, I. A. Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

83 Scopus citations


We report an experimental observation of narrow and high-contrast spectra, which are induced by interacting dark resonances and have been predicted in Phys. Rev. A 60, 3225 (1999). Spectra are measured with cold [Formula Presented] atoms produced by a magneto-optical trap. In this experimental system, a coupling laser and a weak probe laser form a three-level Λ-type configuration of electromagnetically induced transparency (EIT); a microwave drives a magnetic-dipole transition between the fourth level and the ground state that is coupled with the excited state by the coupling laser. The observed spectral profile of probe absorption exhibits a very sharp peak emerging inside a narrow EIT dip. Such spectral feature provides more opportunities in manipulating atomic-optical response.

Original languageEnglish
Article number053806
Pages (from-to)1-5
Number of pages5
JournalPhysical Review A. Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - Nov 2001

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