Overtone generation in driven coherent media
2009 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 79, no 6, 063832-1-063832-7 p.Article in journal (Refereed) Published
We observe overtone signal generation of a near-resonant bichromatic light field interacting with 85Rb on the Zeeman split F=2F=1,2,3 hyperfine transitions of the D2 line at 780 nm. A nonperturbative theoretical model for electromagnetically induced transparency is developed in order to explain this phenomenon. Assuming a system, an explicit and convenient expression for the atomic coherence is derived from the Lindblad equation assuming a phase-damping channel. The light field state is parametrically varied through one beat note of the bichromatic field and the spatial properties are studied by numerically solving the coupled-wave equation. The polarization characteristics is analyzed on the Poincaré sphere, which together with field intensity analysis offers a simple explanation of the harmonic beating signal due to Stokes vector rotation around the Poincaré sphere and decoherence effects. The experimental data and theoretical analysis focus on the first and second harmonics, although many higher harmonics are present. A distinct and narrow minimum of the second-harmonic generation is measured on two-photon resonance.
Place, publisher, year, edition, pages
2009. Vol. 79, no 6, 063832-1-063832-7 p.
light-matter coherence, overtone generation
Physical Sciences Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-11223DOI: 10.1103/PhysRevA.79.063832ISI: 000267700100182ScopusID: 2-s2.0-67649382253OAI: oai:DiVA.org:kth-11223DiVA: diva2:242265
QC 201009272009-10-072009-10-072010-09-27Bibliographically approved