Ultra-High Bit Rate All-Optical Half Subtractor Based on Photonic Crystal

Tamer S. Mostafa, Nazmi Mohammed, El Sayed M. El-Rabaie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


An innovative two-dimensional photonic crystal based all-optical Half Subtractor was constructed, simulated and evaluated. It was arranged on a linear square lattice photonic crystal platform. An ultra-compact, simple design occupying an area of 128.52 μm2 was constructed. The suggested design includes one ring resonator with cylindrical silicon rods organized in an air background. Phase shifter unit or auxiliary inputs are not required for its operation. Finite difference time domain and plane wave expansion methods were used for analysing the structure. Rod's radius was enhanced to provide a successful operation at 1.54 μm with 0.108 μm inner rod radius. The outcome is an ultra-high bit rate of 6.33 Tbit/s. The main drawbacks of this design lie in its lowest contrast ratio of 3.237 dB, and the design is highly sensitive to the waveguide's length.

Original languageEnglish
Title of host publicationProceedings of 2019 36th National Radio Science Conference, NRSC 2019
EditorsRowayda Sadek, Ahmad Abdullatif Goudah, Sherif ElDiasty
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages9
ISBN (Electronic)9781728107530
StatePublished - Apr 2019
Event36th National Radio Science Conference, NRSC 2019 - Port Said, Egypt
Duration: 16 Apr 201918 Apr 2019

Publication series

NameNational Radio Science Conference, NRSC, Proceedings


Conference36th National Radio Science Conference, NRSC 2019
CityPort Said


  • All-optical Half Subtractor (AOHS)
  • interference-based phenomenon
  • optical computing
  • photonic crystal
  • ring resonator
  • ultra-high bit rate


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