Design of All-Optical Logical AND Gate Based on Photonic Crystal Using T-Shaped Waveguide

  • Tanvi SachdevEmail author
  • Anil Kumar Shukla
  • G. N. Pandey
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 194)


In this paper design of all optical logical AND gate is proposed based on 2-D photonic crystal. The structure proposed consists of Si rods placed in air background with T-junction using line defect and point defect in the photonic crystal. Finite difference time domain (FDTD) and plane-wave expansion (PWE) methods are used for the simulation and analysis of the performance of the proposed gate. The size of the logic gate is only about 16 μm × 16 μm and it works in the 1550 nm wavelength. The contrast ratio obtained for this structure is 11 dB. A good forbidden band gap in the normalized frequency range of 0.277883 ≤ (1/λ) ≤ 0.417455 for Transverse Electric (TE) mode is obtained for this structure. Therefore, band gap width is 0.139572. The simplicity and the small sized T-shaped structure along with high contrast ratio make this device suitable candidate for integration in optical communication.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  • Tanvi Sachdev
    • 1
    Email author
  • Anil Kumar Shukla
    • 1
  • G. N. Pandey
    • 2
  1. 1.Amity Institute of Telecom Engineering and ManagementAmity UniversityNoidaIndia
  2. 2.Department of Physics, Amity Institute of Applied ScienceAmity UniversityNoidaIndia

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