{"title":"Line broadening analysis for open states: two- and three-photon spectroscopy","authors":"Dorothy Koki Mringie, Kipkorir Cornelius, Geoffrey Kihara Rurimo, Ogaro Elijah Nyakang’o","doi":"10.1140/epjd/s10053-025-01004-y","DOIUrl":null,"url":null,"abstract":"<p>In this paper, we present a theoretical analysis of line broadening mechanisms for open states in two-photon spectroscopy (a V-type atomic system). The effects of optical pumping of population to a dark state (or meta-stable states) and partial Doppler broadening due to wavelength mismatch are solved using electromagnetically induced absorption (EIA) effect in triple resonance spectroscopy. The finite linewidth of IR transition and opposite Doppler shifts of the fixed IR laser frequency fields in a counter-propagation <span>\\(\\Lambda \\)</span>-system, which restricts EIA effect to a narrow range of frequencies. For atomic vapor at a finite temperature, narrow dips with large amplitude are induced on the transparency spectra of the probe, effectively resolving closely spaced lines of the <span>\\(6\\text {P}_{3/2}\\)</span> state in <span>\\(^{85}\\)</span>Rb.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 5","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal D","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epjd/s10053-025-01004-y","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, we present a theoretical analysis of line broadening mechanisms for open states in two-photon spectroscopy (a V-type atomic system). The effects of optical pumping of population to a dark state (or meta-stable states) and partial Doppler broadening due to wavelength mismatch are solved using electromagnetically induced absorption (EIA) effect in triple resonance spectroscopy. The finite linewidth of IR transition and opposite Doppler shifts of the fixed IR laser frequency fields in a counter-propagation \(\Lambda \)-system, which restricts EIA effect to a narrow range of frequencies. For atomic vapor at a finite temperature, narrow dips with large amplitude are induced on the transparency spectra of the probe, effectively resolving closely spaced lines of the \(6\text {P}_{3/2}\) state in \(^{85}\)Rb.
期刊介绍：
The European Physical Journal D (EPJ D) presents new and original research results in:
Atomic Physics;
Molecular Physics and Chemical Physics;
Atomic and Molecular Collisions;
Clusters and Nanostructures;
Plasma Physics;
Laser Cooling and Quantum Gas;
Nonlinear Dynamics;
Optical Physics;
Quantum Optics and Quantum Information;
Ultraintense and Ultrashort Laser Fields.
The range of topics covered in these areas is extensive, from Molecular Interaction and Reactivity to Spectroscopy and Thermodynamics of Clusters, from Atomic Optics to Bose-Einstein Condensation to Femtochemistry.
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