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EnglishAn analytical method based on a two-mode approximation is here developed to study the optical response of a periodically modulated medium of ultracold atoms driven into a regime of standing-wave electromagnetically induced transparency. A systematic comparison with the usual approach based on the coupled Maxwell-Liouville equations shows that our method is very accurate in the frequency region of interest. Our method, in particular, explains in a straightforward manner the formation of a well-developed photonic bandgap in the optical Bloch wave vector dispersion. For ultracold (87)Rb atoms nearly perfect reflectivity may be attained and a light pulse whose frequency components are contained within the gap is seen to be reflected with little loss and deformation. (C) 2008 Optical Society of America
| Titolo: | Controlling the photonic band structure of optically driven cold atoms |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1364/JOSAB.25.001840 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11384/30399
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