Multiple-input hybrid plasmonic OR logic gate with a nanostructure.

Area of Science:

• * Plasmonics and Nanophotonics
• * Optical Computing and Logic Devices
• * Metamaterials and Nanostructures

Background:

• * Plasmonic devices offer potential for miniaturized optical circuits.
• * Logic gates are fundamental components in computing systems.
• * Hybrid plasmonic structures can enhance light-matter interactions.

Purpose of the Study:

• * To construct and analyze a multiple-input hybrid plasmonic OR logic gate.
• * To evaluate the performance of three- and four-input OR gates using interference principles.
• * To assess key performance metrics including transmission value, modulation depth, and insertion loss.

Main Methods:

• * Finite Element Method (FEM) simulations using COMSOL software (version 5.5).
• * Design and analysis of hybrid plasmonic structures utilizing constructive and destructive interference.
• * Evaluation of device performance based on transmission (T) value, modulation depth (MD), and insertion loss (IL).

Main Results:

• * Achieved high transmission amplification: 216.5% for a three-input gate and 301.5% for a four-input gate.
• * Demonstrated excellent modulation depth: 98.85% (three-input) and 99.33% (four-input).
• * Insertion losses were -4.07 dB (three-input) and -5.4 dB (four-input) at a resonance wavelength of 1310 nm.

Conclusions:

• * The developed hybrid plasmonic OR logic gates exhibit promising performance for optical computing applications.
• * The designs leverage interference principles to achieve efficient logic operations at the nanoscale.
• * Further optimization could lead to more advanced integrated photonic circuits.