A proposal for low cross-talk square-lattice photonic crystal waveguide intersection utilizing the symmetry of waveguide modes

2007 ◽  
Vol 273 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Zhaofeng Li ◽  
Haibo Chen ◽  
Jianjun Chen ◽  
Fuhua Yang ◽  
Houzhi Zheng ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Cross Talk ◽  
Square Lattice ◽  
Photonic Crystal Waveguide ◽  
Waveguide Modes

Simulation of Broadband Transmission Photonic Crystal Waveguide Crossing with Linear Taper

2013 ◽  
Vol 479-480 ◽  
pp. 133-136
Author(s):  
Yih Bin Lin ◽  
Rei Shin Chen ◽  
Ting Chung Yu ◽  
Ju Feng Liu
Keyword(s):  
Photonic Crystal ◽  
Finite Difference ◽  
Cross Talk ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Transmission Band ◽  
Time Domain Method ◽  
Photonic Crystal Waveguide ◽  
Difference Time ◽  
Novel Design

A novel design of photonic crystal waveguide crossing with taper structure is proposed. Simulations are performed by finite-difference time-domain method. The results show the proposed design has both high transmission and low cross talk characteristics. The transmission band and low cross talk band can be tuned to match each other by adjusting the taper structure..

Experimental verification of cross talk reduction in photonic crystal waveguide crossings

2004 ◽  
Vol 85 (16) ◽  
pp. 3351-3353 ◽  
Author(s):  
Young-Geun Roh ◽  
Sungjoon Yoon ◽  
Heonsu Jeon ◽  
Seung-Ho Han ◽  
Q-Han Park
Keyword(s):  
Photonic Crystal ◽  
Cross Talk ◽  
Experimental Verification ◽  
Photonic Crystal Waveguide

scholarly journals Design of a Curved Shape Photonic Crystal Taper for Highly Efficient Mode Coupling

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 585
Author(s):  
Reyhaneh Jannesari ◽  
Thomas Grille ◽  
Cristina Consani ◽  
Gerald Stocker ◽  
Andreas Tortschanoff ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Hexagonal Lattice ◽  
Coupling Efficiency ◽  
Smooth Transition ◽  
Square Lattice ◽  
Group Index ◽  
Photonic Crystal Waveguide ◽  
Silicon Rods

The design and modeling of a curved shape photonic crystal taper consisting of Si rods integrated with a photonic crystal waveguide are presented. The waveguide is composed of a hexagonal lattice of Si rods and optimized for CO2 sensing based on absorption spectroscopy. We investigated two different approaches to design a taper for a photonic crystal waveguide in a hexagonal lattice of silicon rods. For the first approach (type 1), the taper consists of a square lattice taper followed by a lattice composed of a smooth transition from a square to a hexagonal lattice. In the second approach (type 2), the taper consists of a distorted hexagonal lattice. Different shapes, such as convex, concave, and linear, for the curvature of the taper were considered and investigated. The structure of the taper was improved to enhance the coupling efficiency up to 96% at a short taper length of 25 lattice periods. The finite-difference time-domain (FDTD) technique was used to study the transmission spectrum and the group index. The study proves the improvement of coupling using a curved shape taper. Controlling the group index along the taper could be further improved to enhance the coupling efficiency in a wider spectral range.

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