title: Transformation of electromagnetically induced transparency into enhanced absorption with a standing-wave coupling field in an Rb vapor cell.
abstract: We present the transformation of electromagnetically induced transparency (EIT) into narrow enhanced absorption with an on-resonant standing-wave coupling field in the 5S(1/2)-5P(1/2) transition of the Lambda-type system of (87)Rb atoms. When a coupling laser field was changed from a travelling-wave to a standing-wave that was made by adding a counter-propagating L(C) laser, the transmittance spectrum of the L(P) laser transformed the typical EIT into dramatically enhanced absorption, and a Bragg reflection signal was generated by the periodic modulation of atomic absorption. The reflected probe laser corresponding to a Bragg reflection was measured to be approximately 11.5% of the power of the incident probe laser. We analyzed the enhanced absorption signal and Bragg reflection spectrum as a function of the power and frequency detuning of the coupling laser.
authors.affiliation: Department of Physics, Pusan National University, Busan, Korea.
authors.forename: In-Ho
authors.initials: IH
authors.lastname: Bae
authors.forename: Han Seb
authors.initials: HS
authors.lastname: Moon
authors.forename: Min-Koeung
authors.initials: MK
authors.lastname: Kim
authors.forename: Lim
authors.initials: L
authors.lastname: Lee
authors.forename: Jung Bog
authors.initials: JB
authors.lastname: Kim
mesh_terms: D000042:Absorption; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry / Q000528:radiation effects; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012414:Rubidium Radioisotopes / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D005740:Gases; D012414:Rubidium Radioisotopes