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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26948–26955

On-chip optical diode based on silicon photonic crystal heterojunctions

Chen Wang, Chang-Zhu Zhou, and Zhi-Yuan Li  »View Author Affiliations

Optics Express, Vol. 19, Issue 27, pp. 26948-26955 (2011)

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Optical isolation is a long pursued object with fundamental difficulty in integrated photonics. As a step towards this goal, we demonstrate the design, fabrication, and characterization of on-chip wavelength-scale optical diodes that are made from the heterojunction between two different silicon two-dimensional square-lattice photonic crystal slabs with directional bandgap mismatch and different mode transitions. The measured transmission spectra show considerable unidirectional transmission behavior, in good agreement with numerical simulations. The experimental realization of on-chip optical diodes with wavelength-scale size using all-dielectric, passive, and linear silicon photonic crystal structures may help to construct on-chip optical logical devices without nonlinearity or magnetism, and would open up a road towards photonic computers.

© 2011 OSA

OCIS Codes
(230.1150) Optical devices : All-optical devices
(230.3240) Optical devices : Isolators
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optical Devices

Original Manuscript: November 23, 2011
Revised Manuscript: December 5, 2011
Manuscript Accepted: December 6, 2011
Published: December 16, 2011

Chen Wang, Chang-Zhu Zhou, and Zhi-Yuan Li, "On-chip optical diode based on silicon photonic crystal heterojunctions," Opt. Express 19, 26948-26955 (2011)

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