AND gate

Optics

Physics

Engineering

Logic gate

Footprint

Dielectric

Electronic circuit

Paleontology

Nonlinear system

Finite-difference time-domain method

Materials science

Multiplexing

Photonics

Electronic engineering

Computer science

Optoelectronics

Quantum mechanics

Multiplexer

Demultiplexer

Photonic crystal

Biology

Journal of the Optical Society of America B

In the present paper, we aim to report an ultra-compact AlGaAs&#x03BA;(3) photonic crystal structure to realize multifunctional logic responses. The properties of the proposed model are numerically investigated with different physical parameters by the 2D-finite difference time domain (FDTD) method. For this purpose, the effect of the geometrical parameters and dielectric materials, including Si and InSb, in the near-infrared region are studied. To obtain dynamical tunability of the proposed model, the effect of the defects is then utilized. Numerical results show that the proposed devices are able to operate as multifunctional logic devices including an AND gate and a demultiplexer. Moreover, the structure has a compact footprint of 8.85&#x2009;&#x2009;&#x03BC;m&#x00D7;8.85&#x2009;&#x2009;&#x03BC;m&#x00D7;100&#x2009;&#x2009;nm. We expect that this theoretical result leads to remarkable applications in photonic integrated circuits, e.g.,&#x00A0;optical memory.

2D-FDTD simulation of ultra-compact multifunctional logic gates with nonlinear photonic crystal