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- Title
High-performance and ultrafast configurable all-optical photonic crystal logic gates based on interference effects.
- Authors
Safinezhad, Atefeh; Babaei Ghoushji, Hadi; Shiri, Mehrdad; Rezaei, Mir Hamid
- Abstract
This paper presents a configurable structure to realize all-optical photonic crystal logic gates based on the interference effects. The photonic crystal waveguides are realized by creating defects in a square lattice of silicon rods in the air. The proposed structure consists of four input ports, including two ports for applying input signals of logic functions and two ports for applying control signals. Therefore, all-optical NOT, OR, XOR, AND, NOR, and NAND logic gates as well as A ¯ · B and A ¯ + B logic functions can be implemented. Simulations are performed using the finite-difference time-domain method. The simulation results show high extinction ratios (ERs) of logic gates operating in the optical communication C band. The lowest ERmin is related to the NAND logic gate with a value of 14.2 dB at the wavelength of 1.55 μm. The maximum propagation delay is equal to 285 fs, corresponding to the OR and AND logic gates. Also, the total footprint of the structure is about 192 μm2. The presented configurable structure is a promising candidate for use in integrated photonic circuits.
- Subjects
LOGIC circuits; PHOTONIC crystals; FINITE difference time domain method; INTEGRATED circuits; NAND gates; PHOTONIC crystal fibers; OPTICAL communications
- Publication
Optical & Quantum Electronics, 2021, Vol 53, Issue 5, p1
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-021-02856-5