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Applicant:
Central University of Tamil Nadu 
Author:
H B Crispin and R Arun 
Corresponding Authors:
R. Arun 
DOI #:
10.1088/1361-6455/ab08e3 
Title:
Fluorescence control through vacuum induced coherences 
Journal:
J. Phys. B: At. Mol. Opt. Phys.  
Year:
2019 
Volume:
52 
Page:
075402 
Keywords:
atomic coherence, spontaneous emission, resonance fluorescence, vacuum induced coherence 
Abstract:
The resonance fluorescence of a four-level atom in J = 1/2 to J = 1/2 transition driven by two coherent fields is studied. We find that the incoherent fluorescence spectrum shows a direct indication of vacuum-induced coherence in the atomic system. We show that such coherence manifests itself via an enhancement or suppression of the spectral peaks in the π-polarized fluorescence. The effect of the relative phase of the driving fields on the spectral features is also investigated. We show that phase-dependent enhancement or suppression of the fluorescence peaks appears in the incoherent spectrum emitted along the σ transitions. It is found that this phase dependence occurs because of the polarization-detection scheme employed for the observation of the fluorescence light. We present an analytical explanation, based on dressed states of the atom-field system, to interpret the numerical results. 
Entered by:
R. ARUN on 2020-09-02 
 
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