Design of two-dimensional photonic crystal based ultra compact optical RS flip-flop

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.

Animal Comfort Studies in Natural Environment Reserves Integrating RS and GIS

“…RS, or remote sensing technology, is frankly the use of satellites to acquire remote sensing images, which are provided to GIS as macro information and are one of the important data sources for GIS [11,12]. GIS, on the other hand, is to mine and develop the acquired data (RS data, GPS data, map data, etc.)…”

Design of ultra compact 4:2 encoder using two dimensional photonic crystals

“…The types of photonic crystals based on fabrication, are 1D, 2D and 3D among which 2D PC is highly attractive because other optical devices can be easily integrated with it. Hence can be used e ciently to build various photonic devices such as logic gates [5], sensors [6, 7], ip ops [8], lters [9] and encoders [10][11][12][13][14][15][16][17][18][19].…”