Saturable absorption and 'slow light'

Details Saturable absorption and 'slow light' Saturable absorption and 'slow light'

2005-12-16

arxiv.org/abs/physics/0512149v2

Physics

Optics

11 pages 4 figures (data analysis of bacteriorhodopsin 'slow light' experiment by Wu and Rao: Phys Rev Letters 95 253601 (2005

Scientific paper

Quantitative evaluation of some recent 'slow light' experiments based on coherent population oscillations (CPO) shows that they can be more simply interpreted as saturable absorption phenomena. Therefore they do not provide an unambiguous demonstration of 'slow light'. Indeed a limiting condition on the spectral bandwidth is not generally satisfied, such that the requirements for burning a narrow spectral hole in the homogeneously broadened absorption line are not met. Some definitive tests of 'slow light' phenomena are suggested, derived from analysis of phase shift and pulse delay for a saturable absorber

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