Photonic bands and group-velocity dispersion in Si/SiO2 photonic crystals from white-light interferometry -: art. no. 115107

被引:33
作者
Galli, M
Bajoni, D
Marabelli, F
Andreani, LC
Pavesi, L
Pucker, G
机构
[1] Univ Pavia, Ist Nazl Fis Mat, I-27100 Pavia, Italy
[2] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy
[3] Univ Trent, Ist Nazl Fis Mat, I-38050 Trent, Italy
[4] Univ Trent, Dipartimento Fis, I-38050 Trent, Italy
[5] IRST ITC, Ist Ric Sci & Tecnol, I-38050 Trent, Italy
来源
PHYSICAL REVIEW B | 2004年 / 69卷 / 11期
关键词
D O I
10.1103/PhysRevB.69.115107
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The phase delay of a light beam transmitted through (Si/SiO2)(m) multilayers with m=2,4,6,8 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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页数:7
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