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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 23 — Nov. 10, 2008
  • pp: 18992–19000

All-optical half adder based on cross structures in two-dimensional photonic crystals

Qiang Liu, Zhengbiao Ouyang, Chih Jung Wu, Chung Ping Liu, and Jong C. Wang  »View Author Affiliations

Optics Express, Vol. 16, Issue 23, pp. 18992-19000 (2008)

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We propose an all-optical half adder based on two different cross structures in two-dimensional photonic crystals. One cross structure contains nonlinear materials and functions as an “AND” logic gate. The other one only contains linear materials and acts as an “XOR” logic gate. The system is demonstrated numerically by the FDTD method to work as expected. The optimal operating speed without considering the response time of the nonlinear material, the least ON to OFF logic-level contrast ratio, and the minimum power for this half adder obtained were 0.91Tbps, 16dB and 436mW, respectively. The proposed structure has the potential to be used for constructing all-optical integrated digital computing circuits.

© 2008 Optical Society of America

OCIS Codes
(200.4660) Optics in computing : Optical logic
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: September 22, 2008
Revised Manuscript: October 28, 2008
Manuscript Accepted: October 29, 2008
Published: November 3, 2008

Qiang Liu, Zhengbiao Ouyang, Chih Jung Wu, Chung Ping Liu, and Jong C. Wang, "All-optical half adder based on cross structures in two-dimensional photonic crystals," Opt. Express 16, 18992-19000 (2008)

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