Optical reflection from a free-carrier-induced front in a silicon slow light waveguide

2020 ◽  
Author(s):  
Mahmoud A. A. Gaafar ◽  
Dirk Jalas ◽  
Liam O’Faolain ◽  
Juntao Li ◽  
Thomas F. Krauss ◽  
...  
Keyword(s):  
Slow Light ◽  
Free Carrier ◽  
Optical Reflection ◽  
Light Waveguide

Transmission and reflection from a free carrier front in a silicon slow light waveguide

2017 ◽  
Author(s):  
Mahmoud A. Gaafar ◽  
Dirk Jalas ◽  
Liam O’Faolain ◽  
Juntao Li ◽  
Thomas F. Krauss ◽  
...  
Keyword(s):  
Slow Light ◽  
Free Carrier ◽  
Light Waveguide ◽  
Transmission And Reflection

Indirect transitions at a free carrier front in a silicon slow light waveguide

2018 ◽  
Author(s):  
Alexander Yu. Petrov ◽  
Mahmoud A. Gaafar ◽  
Dirk Jalas ◽  
Liam O’Faolain ◽  
Juntao Li ◽  
...  
Keyword(s):  
Slow Light ◽  
Free Carrier ◽  
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

High‐Responsivity Mid‐Infrared Black Phosphorus Slow Light Waveguide Photodetector

2020 ◽  
Vol 8 (13) ◽  
pp. 2000337 ◽  
Author(s):  
Yiming Ma ◽  
Bowei Dong ◽  
Jingxuan Wei ◽  
Yuhua Chang ◽  
Li Huang ◽  
...  
Keyword(s):  
Slow Light ◽  
Black Phosphorus ◽  
Mid Infrared ◽  
High Responsivity ◽  
Light Waveguide
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