Thresholdless dressed-atom laser in a photonic band-gap material

Li, Gao-Xiang, Luo, Min and Ficek, Zbignew (2009) Thresholdless dressed-atom laser in a photonic band-gap material. Physical Review A (Atomic, Molecular and Optical Physics), 79 5: 1-6. doi:10.1103/PhysRevA.79.053847

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Author Li, Gao-Xiang
Luo, Min
Ficek, Zbignew
Title Thresholdless dressed-atom laser in a photonic band-gap material
Journal name Physical Review A (Atomic, Molecular and Optical Physics)   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2009-05-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.79.053847
Open Access Status File (Publisher version)
Volume 79
Issue 5
Start page 1
End page 6
Total pages 6
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
We demonstrate the capability of complete thresholdless lasing operation between dressed states of a twolevel atom located inside a microscopic cavity engineered in a photonic band-gap material. We distinguish between threshold and thresholdless behaviors by analyzing Mandel’s Q parameter for the cavity field. We find that the threshold behavior depends on whether the spontaneous emission is or is not present on the lasing transition. In the presence of the spontaneous emission, the mean photon number of the cavity field exhibits threshold behavior, indicating that the system may operate as an ordinary laser.When the spontaneous emission is eliminated on the lasing transition, no threshold is observed for all values of the pumping rate, indicating the system becomes a thresholdless laser. Moreover, we find that, under a thresholdless operation, the mean photon number can increase nonlinearly with the pumping rate, and this process is accompanied by a sub-Poissonian statistics of the field. This suggests that the nonclassical statistics can be used to distinguish a nonlinear operation of the dressed-atom laser.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 17:58:35 EST by Mr Andrew Martlew on behalf of School of Mathematics & Physics