A Novel Design of All Optical Logical AND Gate Based on 2‐D Photonic Crystal. Issue 1 (17th June 2021)

• Record Type: Journal Article
• Authors: Shukla, Anil Kumar; Pandey, Girijesh Narayan
• Editors: Singh, Pramod Kumar; Noor, Ikhwan Syafiq Mohd; Singh, Ram Chandra; Gultekin, Burak
• Is Part Of: Macromolecular symposia. Volume 397:Issue 1(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-17
• Subjects: finite difference time domain (FDTD) -- logic gates -- photonic crystals -- plane wave expansion (PWE); Macromolecules -- Congresses; Polymers -- Congresses; Polymerization -- Congresses; Macromolecules -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/masy.202000341
• Languages: English
• ISSNs: 1022-1360

Abstract

Abstract: All‐optical logic AND gate is realized based on two dimensional photonic crystal composed of Si rods in air. The structure proposed is designed with T‐junction using line defect and point defect in the crystal. Plane‐wave expansion and finite difference time domain methods are used to simulate and analyze the performance of the proposed AND gate. The size of the logic gate is only about 18 µm x 18 µm and it works in the 1550 nm wavelength. The contrast ratio obtained for this structure is 11db. The band diagram obtained for this structure gives a good forbidden band gap in the normalized frequency range of 0.264783 ≤ (1/λ) ≤ 0.4213565 for transverse electric mode. Therefore, band gap width is 0.1247972. The simplicity and the small sized T‐shaped structure along with high contrast ratio make this device suitable candidate for integration in optical communication.