Squeezed single-atom laser in a photonic crystal

Tan, Rong, Li, Gao-xiang and Ficek, Zbigniew (2008) Squeezed single-atom laser in a photonic crystal. Physical Review A, 78 2: . doi:10.1103/PhysRevA.78.023833

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Author Tan, Rong
Li, Gao-xiang
Ficek, Zbigniew
Title Squeezed single-atom laser in a photonic crystal
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2008-08-19
Sub-type Article (original research)
DOI 10.1103/PhysRevA.78.023833
Open Access Status File (Publisher version)
Volume 78
Issue 2
Total pages 11
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2009
Language eng
Abstract We study nonclassical and spectral properties of a strongly driven single-atom laser engineered within a photonic crystal that facilitates a frequency-dependent reservoir. In these studies, we apply a dressed atom model approach to derive the master equation of the system and study the properties of the dressed laser under the frequency-dependent transition rates. By going beyond the secular approximation in the dressed-atom cavity-field interaction, we find that if, in addition, the nonsecular terms are included into the dynamics of the system, then nonlinear processes can occur that lead to interesting aspects of cavity field behavior. We calculate variances of the quadrature phase amplitudes and the incoherent part of the spectrum of the cavity field and show that they differ qualitatively from those observed under the secular approximation. In particular, it is found that the nonlinear processes lead to squeezing of the fluctuations of the cavity field below the quantum shot noise limit. The squeezing depends on the relative population of the dressed states of the system and is found only if there is no population inversion between the dressed states. Furthermore, we find a linewidth narrowing below the quantum limit in the spectrum of the cavity field that is achieved only when the secular approximation is not made. An interpretation of the linewidth narrowing is provided in terms of two phase-dependent noise (squeezing) spectra that make up the incoherent spectrum. We establish that the linewidth narrowing is due to squeezing of the fluctuations in one quadrature phase components of the cavity field.
Keyword Atom lasers
Dressed states
Optical squeezing
Photonic crystals
Shot noise
Spectral line narrowing
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article #023833

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 19 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 18 times in Scopus Article | Citations
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Created: Tue, 24 Mar 2009, 12:45:00 EST by Jo Hughes on behalf of School of Mathematics & Physics