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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 10 — May. 20, 2013
  • pp: 11877–11888

Ultralow-energy and high-contrast all-optical switch involving Fano resonance based on coupled photonic crystal nanocavities

Kengo Nozaki, Akihiko Shinya, Shinji Matsuo, Tomonari Sato, Eiichi Kuramochi, and Masaya Notomi  »View Author Affiliations


Optics Express, Vol. 21, Issue 10, pp. 11877-11888 (2013)
http://dx.doi.org/10.1364/OE.21.011877


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Abstract

We experimentally and theoretically clarified that a Fano resonant system based on a coupled optical cavity has better performance when used as an all-optical switch than a single cavity in terms of switching energy, contrast, and operation bandwidth. We successfully fabricated a Fano system consisting of doubly coupled photonic-crystal (PhC) nanocavities, and demonstrated all-optical switching for the first time. A steep asymmetric transmission spectrum was clearly observed, thereby enabling a low-energy and high-contrast switching operation. We achieved the switching with a pump energy of a few fJ, a contrast of more than 10 dB, and an 18 ps switching time window. These levels of performance are actually better than those for Lorentzian resonance in a single cavity. We also theoretically investigated the achievable performance in a well-designed Fano system, which suggested a high contrast for the switching of more than 20 dB in a fJ energy regime.

© 2013 OSA

OCIS Codes
(130.4815) Integrated optics : Optical switching devices
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: March 18, 2013
Revised Manuscript: April 30, 2013
Manuscript Accepted: May 2, 2013
Published: May 8, 2013

Citation
Kengo Nozaki, Akihiko Shinya, Shinji Matsuo, Tomonari Sato, Eiichi Kuramochi, and Masaya Notomi, "Ultralow-energy and high-contrast all-optical switch involving Fano resonance based on coupled photonic crystal nanocavities," Opt. Express 21, 11877-11888 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-10-11877


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