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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 5 — Feb. 10, 2012
  • pp: 680–685

Compact and low-power optical logic NOT gate based on photonic crystal waveguides without optical amplifiers and nonlinear materials

Chih Jung Wu, Chung Ping Liu, and Zhengbiao Ouyang  »View Author Affiliations


Applied Optics, Vol. 51, Issue 5, pp. 680-685 (2012)
http://dx.doi.org/10.1364/AO.51.000680


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Abstract

An optical logic NOT gate (OLNG) is presented based on photonic crystal (PhC) waveguides without nonlinear materials and optical amplifiers. Also, a way of determining the operating parameters is presented. It is demonstrated through finite-difference time-domain simulations that the structure presented can operate as an OLNG. The optimized contrast ratio, defined as the logic-“1” output power divided by the logic-“0” output power, is found to be 297.07 or 24.73 dB. The size of the OLNG can be as small as 7a×7a, where a is the lattice constant of the PhC. Further, the OLNG presented in this paper can operate at a bit rate as high as 2.155Tbit/s, which is much higher than that of electronic or optical logic gates developed until now. Moreover, as it is not based on the nonlinear effect, the OLNG can operate at very low powers and a relatively large operating bandwidth. This is favorable for large-scale optical integration and for developing multiwavelength parallel-processing optical logic systems.

© 2012 Optical Society of America

OCIS Codes
(130.3750) Integrated optics : Optical logic devices
(200.4660) Optics in computing : Optical logic
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(230.5298) Optical devices : Photonic crystals
(230.3750) Optical devices : Optical logic devices
(250.3750) Optoelectronics : Optical logic devices

ToC Category:
Optics in Computing

History
Original Manuscript: October 17, 2011
Manuscript Accepted: December 14, 2011
Published: February 10, 2012

Citation
Chih Jung Wu, Chung Ping Liu, and Zhengbiao Ouyang, "Compact and low-power optical logic NOT gate based on photonic crystal waveguides without optical amplifiers and nonlinear materials," Appl. Opt. 51, 680-685 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-5-680

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