Slow-light effect in dual-periodic photonic lattice
JOSA B, Vol. 25, Issue 4, pp. 599-608 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000599
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Abstract
We present analytical and numerical studies of a photonic lattice with short- and long-range harmonic modulations of the refractive index. Such structures can be prepared experimentally with holographic photolithography. In the spectral region of the photonic bandgap of the underlying single-periodic crystal, we observe a series of bands with anomalously small dispersion. The related slow-light effect is attributed to the long-range modulation of the photonic lattice that leads to formation of an array of evanescently coupled high-Q cavities. The band structure of the lattice is studied with several techniques: (i) transfer matrix approach; (ii) an analysis of resonant coupling in the process of band folding; (iii) effective-medium approach based on coupled-mode theory; and (iv) the Bogolyubov–Mitropolsky approach. The latter method, commonly used in the studies of nonlinear oscillators, was employed to investigate the behavior of eigenfunction envelopes and the band structure of the dual-periodic photonic lattice. We show that reliable results can be obtained even in the case of large refractive index modulation.
© 2008 Optical Society of America
OCIS Codes
(350.5500) Other areas of optics : Propagation
(230.4555) Optical devices : Coupled resonators
(230.5298) Optical devices : Photonic crystals
ToC Category:
Photonic Crystals
History
Original Manuscript: November 20, 2007
Revised Manuscript: February 13, 2008
Manuscript Accepted: February 15, 2008
Published: March 27, 2008
Citation
Alexey G. Yamilov, Mark R. Herrera, and Massimo F. Bertino, "Slow-light effect in dual-periodic photonic lattice," J. Opt. Soc. Am. B 25, 599-608 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-4-599
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