Novel Fiber Optic Gas Sensor Based on Photonic Crystal Slow-Light Waveguide

2013 ◽  
Vol 55 (8) ◽  
pp. 1796-1800 ◽  
Author(s):  
Qi Wang ◽  
Bo Han ◽  
Di Wu ◽  
Yong Zhao
Keyword(s):  
Photonic Crystal ◽  
Gas Sensor ◽  
Slow Light ◽  
Fiber Optic ◽  
Light Waveguide

scholarly journals Unidirectional Slow Light Transmission in Heterostructure Photonic Crystal Waveguide

2018 ◽  
Vol 8 (10) ◽  
pp. 1858 ◽  
Author(s):  
Qiuyue Zhang ◽  
Xun Li
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Environmental Changes ◽  
Light Transmission ◽  
Square Lattice ◽  
Manufacturing Defects ◽  
Interfacial Defects ◽  
Waveguide Design ◽  
Light Waveguide ◽  
Backward Propagation

In conventional photonic crystal systems, extrinsic scattering resulting from random manufacturing defects or environmental changes is a major source of loss that causes performance degradation, and the backscattering loss is amplified as the group velocity slows down. In order to overcome the limitations in slow light systems, we propose a backscattering-immune slow light waveguide design. The waveguide is based on an interface between a square lattice of magneto-optical photonic crystal with precisely tailored rod radii of the first two rows and a titled 45 degrees square lattice of Alumina photonic crystal with an aligned band gap. High group indices of 77, 68, 64, and 60 with the normalized frequency bandwidths of 0.444%, 0.481%, 0.485%, and 0.491% are obtained, respectively. The corresponding normalized delay-bandwidth products remain around 0.32 for all cases, which are higher than previously reported works based on rod radius adjustment. The robustness for the edge modes against different types of interfacial defects is observed for the lack of backward propagation modes at the same frequencies as the unidirectional edge modes. Furthermore, the transmission direction can be controlled by the sign of the externally applied magnetic field normal to the plane.

Slow Light Waveguide and Enhanced Area Microcavity Engineering for High Sensitivity Photonic Crystal Sensors

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Liang Zhu ◽  
Swapnajit Chakravarty ◽  
Cheng-Chih Hsieh ◽  
Wei-Cheng Lai ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
Light Waveguide

Photonic crystal optical switch using a new slow light waveguide and heterostructure Y-junctions

Optik ◽  
2013 ◽  
Vol 124 (23) ◽  
pp. 6292-6297 ◽  
Author(s):  
Shahram Bahadori Haghighi ◽  
Rahim Ghayour ◽  
Babak Vakili
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Optical Switch ◽  
Light Waveguide

Dispersionless one-way slow wave with large delay bandwidth product at the edge of gyromagnetic photonic crystal

2020 ◽  
Vol 34 (10) ◽  
pp. 2050086
Author(s):  
Ye Liu ◽  
Chun Jiang
Keyword(s):  
Photonic Crystal ◽  
Group Velocity ◽  
Communication Systems ◽  
Slow Light ◽  
Weak Interactions ◽  
Group Velocity Dispersion ◽  
Edge State ◽  
Group Index ◽  
Light Waveguide ◽  
Modal Field

We theoretically, demonstrate a high delay bandwidth product (DBP) and zero group velocity dispersion (GVD) in a two-dimensional one-way slow light waveguide. The waveguide consists of gyromagnetic photonic crystal (GMPC) and a cladding formed by silicon photonic crystal. At the edge of the band, weak interactions (“semi-anticrossing”) between the chiral edge state (CES) mode and the mode localized at the surface of cladding are observed. The group velocity of CES wave can be tuned by adjusting the modal field distribution. As a result, an extraordinarily large value of normalized DBP of 0.63 with a group index of 10.32 and a bandwidth ranging from [Formula: see text] to [Formula: see text] is obtained. This result may contribute to one-way slow light applications in information communication systems.

scholarly journals Integration of Photonic Crystal Splitter and Slow Light Waveguide for a Microwave Photonic Filter

2013 ◽  
Vol 5 (4) ◽  
pp. 5501311-5501311 ◽  
Author(s):  
Guansheng Shen ◽  
Huiping Tian ◽  
Daquan Yang ◽  
Yuefeng Ji
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Microwave Photonic ◽  
Light Waveguide

Fan-beam steering device using a photonic crystal slow-light waveguide with surface diffraction grating

2017 ◽  
Vol 42 (23) ◽  
pp. 4990 ◽  
Author(s):  
Keisuke Kondo ◽  
Tomoki Tatebe ◽  
Shoji Hachuda ◽  
Hiroshi Abe ◽  
Fumio Koyama ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Diffraction Grating ◽  
Slow Light ◽  
Beam Steering ◽  
Light Waveguide ◽  
Surface Diffraction

Wideband and low dispersion slow-light waveguide based on a photonic crystal with crescent-shaped air holes

2012 ◽  
Vol 51 (23) ◽  
pp. 5735 ◽  
Author(s):  
Bo Meng ◽  
Ling-ling Wang ◽  
Wei-qing Huang ◽  
Xiao-fei Li ◽  
Xiang Zhai ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Light Waveguide ◽  
Low Dispersion
Sign in / Sign up

Export Citation Format

Share Document