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Title:LASER-MILLIMETER-WAVE TWO-PHOTON RABI OSCILLATIONS EN ROUTE TO COHERENT POPULATION TRANSFER
Author(s):Grimes, David
Contributor(s):Field, Robert W; Colombo, Tony; Zhou, Yan; Barnum, Timothy J
Subject(s):Instrument/Technique Demonstration
Abstract:Core-nonpenetrating Rydberg states of molecules are a relatively untapped resource in molecular physics. Due to the $ell$($ell$+1)/r$^2$ centrifugal barrier, the Rydberg electron in high-$ell$ states is essentially decoupled from the ion-core. This decoupling leads to the system becoming atom-like, with long lifetimes, an “almost good” $ell$ quantum number, and “pure-electronic” transitions that follow $Delta$J$^+$=0 and $Delta$v$^+$=0 propensity rules. Access to these nonpenetrating states is generally blocked by the necessity that the multistep excitation scheme traverses a “zone of death” in which nonradiative decay mechanisms are prohibitively fast. _x000d_ _x000d_ Coherent population transfer methods, such as STImulated Raman Adiabatic Passage (STIRAP), allow population of core-nonpenetrating states without even transiently populating states in the “zone of death.” We demonstrate coherent two-photon population transfer to Rydberg states of barium atoms using a pulsed dye laser and a chirped-pulse millimeter-wave spectrometer. Numerical calculations, using a density matrix formalism, reproduce our experimental results and provide insights into the fractional population transferred, optimal experimental conditions, and possibilities for future improvements, in particular extension to full STIRAP._x000d_
Issue Date:6/22/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/96852
DOI:10.15278/isms.2017.RI05
Date Available in IDEALS:2017-07-27


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