Tesio, Enrico and Robb, Gordon and Ackemann, Thorsten and Firth, William and Oppo, Gian-Luca (2012) Spontaneous optomechanical pattern formation in cold atoms. Physical Review A, 86 (3). ISSN 1050-2947
PRA86_031801_R_12.pdf - Published Version
Available under License Creative Commons Attribution.
Transverse pattern formation in an optical cavity containing a cloud of cold two-level atoms is discussed. We show that density modulation becomes the dominant mechanism as the atomic temperature is reduced. Indeed, for low but easily achievable temperatures the internal degrees of freedom of the atoms can be neglected, and the system is well described by treating them as linear dielectric particles. A linear stability analysis predicts the instability threshold and the spatial scale of the emergent pattern. Numerical simulations in two transverse dimensions confirm the instability and predict the spontaneous formation of honeycomb and hexagonal density structures, respectively, for the blue and red detuned cases.
|Keywords:||optical cavities, cold two-level atoms, stability analysis, Physics, Atomic and Molecular Physics, and Optics|
|Subjects:||Science > Physics|
|Department:||Faculty of Science > Physics|
|Depositing user:||Pure Administrator|
|Date Deposited:||11 Oct 2012 13:59|
|Last modified:||24 Jul 2015 11:40|
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