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EnglishThe phase delay of a light beam transmitted through (Si/SiO2)m multilayers with m52,4,6,8 is measured by white-light interferometry based on a fixed Mach-Zehnder interferometer coupled to a scanning Michelson interferometer. Results for photonic band and group velocity dispersion are obtained in a wide frequency spectrum and compare successfully with the predictions of electromagnetic theory. In particular, a strong slowing down of the group velocity at the band edges and superluminal propagation within the gap are demonstrated.
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| Titolo: | Photonic bands and group velocity dispersion in Si/SiO2 photonic crystals from white-light interferometry | |
| Autori: | ||
| Data di pubblicazione: | 2004 | |
| Rivista: | ||
| Abstract: | The phase delay of a light beam transmitted through (Si/SiO2)m multilayers with m52,4,6,8 is measured by white-light interferometry based on a fixed Mach-Zehnder interferometer coupled to a scanning Michelson interferometer. Results for photonic band and group velocity dispersion are obtained in a wide frequency spectrum and compare successfully with the predictions of electromagnetic theory. In particular, a strong slowing down of the group velocity at the band edges and superluminal propagation within the gap are demonstrated. | |
| Handle: | http://hdl.handle.net/11582/17869 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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