Design of two-dimensional photonic crystal based ultra compact optical RS flip-flop
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TLDR
In this paper, the flip-flop is designed by using two NOR gates, photonic crystal waveguides, four silicon ring resonators, four input ports and two output ports.Abstract:
The presented research deals with designing of a new ultra compact all-optical RS flip-flop on a two-dimensional (2-D) hexagonal photonic crystal platform. The flip-flop is designed by using two NOR gates, photonic crystal waveguides, four silicon ring resonators, four input ports and two output ports. The designed flip-flop structure has hexagonal silicon rods in the air host with a lattice constant a of 630 nm. Si rods have a radius of 0.2a and operating waveleangth of 1550 nm. The novel design provides proper distinction between logic 1 and logic 0 at the output by giving 8.7 dB and 4 dB contrast ratio at Q and Qbar output, respectively. Furthermore, uncomplicated structure resulting in small dimension of 28 μm * 28 μm makes it appropriate for optical integrated circuit in optical networks. FDTD method is used to model the proposed structure and simulated using RSoft FullWAVE simulator tool.read more
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References
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Eight-channel all-optical demultiplexer based on photonic crystal resonant cavities
TL;DR: In this paper, a demultiplexer based on photonic crystals was proposed for dense wavelength division multiplexing transmission systems, where the main cavity was responsible for selecting the wavelength.
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Design of photonic crystal-based all-optical AND gate using T-shaped waveguide
TL;DR: In this paper, the authors presented a new configuration of all-optical AND gate based on two-dimensional photonic crystal composed of Si rods in air, and two AND gate structures with and without probe input are proposed.
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All-optical S-R flip flop using 2-D photonic crystal
TL;DR: In this article, a novel all optical SR flip-flop memory based on two optical NOR gates using 2D photonic crystals (PhC) is presented, which is based on four nonlinear photonic crystal ring resonator and T-type waveguide.
Journal ArticleDOI
Photonic-crystal-based all-optical NOT logic gate
Brahm Raj Singh,Swati Rawal +1 more
TL;DR: The proposed structure has a hexagonal arrangement of silicon rods in air substrate and it has been observed that the maximum output is obtained for a telecom wavelength of 1.554 μm.