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  • Физички факултет
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Еlеktrоmаgnеtski indukоvаni kоhеrеntni еfеkti u lаsеrski pоbuđivаnim Rаmаnоvim rеzоnаncаmа u pаrаmа rubidiјumа

Electromagnetically induced coherent effects in laser excited Raman resonances in rubidium vapor

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2013
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Author
Radonjić, Milan M.
Mentor
Jelenković, Branislav
Committee members
Kuraica, Milorad
Obradović, Bratislav
Poparić, Goran
Arsenović, Dušan
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Abstract
Ova teza predstavlja teorijsku analizu različitih koherentnih efekata u laserski pobuđivanim Ramanovim rezonancama u sistemima sa više nivoa u atomima rubidijuma. Proučavani koherentni efekti uključuju elektromagnet- ski indukovanu transparenciju (EIT), elektromagnetski indukovanu apsor- pciju (EIA) i Štarkovski brzi adijabatski prelaz (engl. SCRAP). EIT i EIA rezonance su ispitivane u Hanle konfiguraciji u vakuumskim ćelijama para rubidijuma detaljnim teorijskim modeliranjem odgovarajućih realističnih sistema. Razvijeni numerički model je pokazao odlično slaganje sa odgovarajućim eksperimentalnim rezultatima i omogućio njihovo uspešno objašnjenje. Dodatno, postojeća teorija SCRAP-a u sistemima sa dva i tri nivoa je proširena na slučajeve dva i tri nivoa sa proizvoljnim brojem degenerisanih podnivoa. Vakuumske ćelije para alkalnih metala su često korišćene u kvantnoj optici prilikom istraživanja koherentnih pojava u interakciji lasera sa atomima. Jedna od osnovnih osobina laserskog zra...čenja koja utiče na koherentnu evoluciju atoma je njegov lokalni intenzitet. Uopšteno gledano, koherentni efekti zavise nelinearno od intenziteta lasera. Neposredna posledica toga je da profil intenziteta laserskog snopa mora uticati na koherentnu atomsku evoluciju. Štaviše, različiti delovi jednog istog laserskog snopa trebalo bi da različito doprinose koherentnim efektima...

This thesis presents the theoretical analysis of various coherent effects in laser excited Raman resonances in multilevel systems in rubidium atoms. Studied coherent effects include electromagnetically induced transparency (EIT), electromagnetically induced absorption (EIA) and Stark-chirped rapid adiabatic passage (SCRAP). EIT and EIA resonances are examined in Hanle configuration in rubidium vapor vacuum cells using detailed theoretical modeling of related realistic systems. Developed numerical model provided excellent agreement with actual experimental results and their successful explanation. Furthermore, existent theory of SCRAP in two- and three-level systems is extended to the case of two and three degenerate-level manifolds with arbitrary number of substates. Vacuum alkali-metal vapor cells are commonly used in quantum optics for research of coherent phenomena in laser-atom interaction. One of basic properties of laser radiation that in uences the coherent atomic evolution is i...ts local intensity. Generally, the coherent effects depend non-linearly on the laser intensity. Immediate consequence is that the laser beam intensity profile must affect the atomic coherent evolution. Moreover, different parts of the same laser beam should have different contribution to the coherent effects...

Faculty:
Универзитет у Београду, Физички факултет
Date:
28-05-2013
Keywords:
koherentni efekti / coherent effects / Hanle konfiguracija / Ramanove rezonance / rubidijum / Hanle configuration / Raman resonances / rubidium

DOI: 10.2298/bg20130528radonjic

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_nardus_3187
URI
https://nardus.mpn.gov.rs/handle/123456789/3187
http://eteze.bg.ac.rs/application/showtheses?thesesId=748
https://fedorabg.bg.ac.rs/fedora/get/o:7043/bdef:Content/download
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