Three Waveguides Directional Coupler Based on Two Dimensional Square Lattice Photonic Crystal

2016 ◽  
Vol 36 (3) ◽  
pp. 0323002
Author(s):  
苏康 Su Kang ◽  
王梓名 Wang Ziming ◽  
刘建军 Liu Jianjun
Keyword(s):  
Photonic Crystal ◽  
Directional Coupler ◽  
Square Lattice ◽  
Two Dimensional

Band Gap Properties of Two-Dimensional Square Lattice Photonic Crystal Composed of Duck-Shaped

2015 ◽  
Vol 52 (12) ◽  
pp. 121602
Author(s):  
刘娟 Liu Juan ◽  
唐吉玉 Tang Jiyu ◽  
陈彦 Chen Yan ◽  
刘洋 Liu Yang ◽  
董贵仁 Dong Guiren ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Square Lattice ◽  
Two Dimensional

Superlensing property of 2-D glass photonic crystal

2020 ◽  
Vol 92 (2) ◽  
pp. 20501
Author(s):  
Rajib Ghosh ◽  
Rajib Chakraborty
Keyword(s):  
Photonic Crystal ◽  
Optical Absorption ◽  
Glass Matrix ◽  
Optical Microscope ◽  
Fabrication Process ◽  
Square Lattice ◽  
Two Dimensional ◽  
Subwavelength Imaging

A two dimensional square lattice photonic crystal (PhC) formed by placing glass matrix in air is proposed for subwavelength imaging around 840 nm. The superlensing behavior at relatively lower wavelength compared to other reported PhC superlens is obtained by this configuration. Other advantages of using glass is that they have lower optical absorption at this wavelength and is relatively cheap. By placing the proposed PhC arrangement between the object and the objective of a conventional optical microscope, superlensing effect can be realized. Moreover, any change in radius of glass rod during fabrication process can result in the shift of superlensing wavelength.

Two-Dimensional Silicon Nitride Photonic Crystal Band Gap Characteristics

2013 ◽  
Vol 538 ◽  
pp. 201-204
Author(s):  
Shou Xiang Chen ◽  
Xiu Lun Yang ◽  
Xiang Feng Meng ◽  
Yu Rong Wang ◽  
Lin Hui Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Silicon Nitride ◽  
Band Gap ◽  
Lattice Structure ◽  
Photonic Band Gap ◽  
Dielectric Materials ◽  
Filling Ratio ◽  
Square Lattice ◽  
Two Dimensional ◽  
Photonic Band

Plane-wave expansion method was employed to analyze the photonic band gap in two-dimensional silicon nitride photonic crystal. The effects of filling ratio and lattice structure type on the photonic band gap were studied. The results showed that two-dimensional dielectric cylinder type silicon nitride photonic crystal only has TE mode band gap, while, the air column type photonic crystal has complete band gap for TE and TM modes simultaneously. The distribution of band gap can be influenced by the filling ratio of dielectric materials and the lattice type. It is shown that the triangular lattice structure is much easier to form band gap than square lattice structure.

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