空心optical fibers中光晶格的不稳定性和“声子”
Instabilities and "phonons" of optical lattices in hollow optical fibers
摘要：
不稳定性的预测足够长的空心光子光纤，或“腔”，包含一个一维玻色气体中存在的经典的，远红失谐，限制弱电磁模式。我们研究了玻色气体（一种布里渊不稳定性）的单光束和驻波或光晶格的情况。这些驱动系统的不稳定性具有明显的空间结构，在电磁和玻色密度场的组合调制不稳定性。在不稳定性的临界波矢附近，BEC与光的耦合模可以解释为光晶格的“声子”。我们推测这些空间结构的不稳定性的光晶格，我们预测在弱场，发展成为强场预测的空间均匀加热源。
英文摘要：
Instabilities are predicted for a sufficiently long hollow photonic optical fiber, or "cavity", containing a one dimensional Bose-gas in the presence of a classical, far red-detuned, confined weak electromagnetic mode. We examine both a single beam with Bose gas (a type of Brillouin instability) and the case of a standing wave, or optical lattice. The instabilities of these driven systems have pronounced spatial structure, of combined modulational instabilities in the electromagnetic and Bose density fields. Near the critical wave vectors for the instability the coupled modes of the BEC and light can be interpreted as "phonons" of the optical lattice. We conjecture these spatially-structured instabilities for the optical lattice, which we predict at weak fields, develop into the source of spatially homogeneous heating predicted for strong fields.
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