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Controlling the optical bistability via quantum interference in a four-level N-type atomic system

Sahrai, M ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jlumin.2011.03.050
  3. Publisher: 2011
  4. Abstract:
  5. We investigate the optical bistability (OB) and optical multi-stability (OM) in a four-level N-type atomic system. The effect of spontaneously generated coherence (SGC) on OB and OM is then discussed. It is found that SGC makes the medium phase dependent, so the optical bistability and multi-stability threshold can be controlled via relative phase between applied fields. We realize that the frequency detuning of probe and coupling fields with the corresponding atomic transition plays an important role in creation OB and OM. Moreover, the effect of laser coupling fields and an incoherent pumping field on reduction of OB and OM threshold is then discussed
  6. Keywords:
  7. Applied field ; Atomic system ; Atomic transition ; Coupling fields ; Frequency detuning ; Incoherent pumping ; Laser coupling ; Phase dependent ; Quantum interference ; Relative phase ; Spontaneously generated coherence ; Atoms ; Pumping (laser) ; Spontaneous emission ; Optical bistability
  8. Source: Journal of Luminescence ; Volume 131, Issue 8 , August , 2011 , Pages 1682-1686 ; 00222313 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S002223131100158X