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Phys. Rev. B 64, 045106 (2001) [5 pages]

Terahertz time-domain study of a pseudo-simple-cubic photonic lattice

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Takemitsu Aoki and Mitsuo Wada Takeda
Department of Physics, Faculty of Science, Shinshu University, Matsumoto 390-8621, Japan

Joseph W. Haus and Zhenyu Yuan
Electro-Optics Program, The University of Dayton, Dayton, Ohio 45469-0245

Masahiko Tani and Kiyomi Sakai
Kansai Advanced Research Center, Communication Research Laboratory, Iwaoka, Kobe 651-2401, Japan

Noriko Kawai and Kuon Inoue
Research Institute for Electronic Science, Hokkaido University, Kita-ku, Sapporo 060-0812, Japan

Received 5 January 2001; published 29 June 2001

A pseudo-simple-cubic photonic crystal lattice was fabricated in silicon. The phase-shift spectra and the amplitude spectra of the transmitted electromagnetic wave are studied by Terahertz time-domain spectroscopy measurements. The π phase shifts between Fabry-Perot modulation peaks are clearly observed. Our results are in good correspondence with transfer-matrix calculations. The dispersion curves were qualitatively extracted from the frequency dependence of the phase shifts. The gradient of the phase shift becomes large at the band-gap edges. This suggests that the group velocity is correspondingly small near the Brillouin-zone boundary.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v64/e045106
DOI: 10.1103/PhysRevB.64.045106
PACS: 71.15.Ap, 42.70.Qs, 42.25.Bs

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