Focusing systems based on two-dimensional photonic crystals

2021 ◽  
pp. 49-54
Author(s):  
A.Yu. Vetluzhsky ◽  
Keyword(s):  
Photonic Crystals ◽  
Electromagnetic Waves ◽  
Homogeneous Medium ◽  
Two Dimensional ◽  
Edge Waves ◽  
Constructive Interference ◽  
Radiation Focusing ◽  
First Case ◽  
Dielectric Structures ◽  
Low Refractive Index

Methods of focusing electromagnetic waves based on the use of two-dimensional photonic crystals formed by metal and dielectric elements are considered. In the first case the physical basis for the creation of radiation focusing systems consists in the manifestation of the properties of a homogeneous medium with ultra-low refractive index by metal photonic crystals at the frequencies of the first allowed zone. In the second case the possibility of constructive interference of direct transmission waves and edge waves diffracting at the edges of spatially bounded dielectric structures is used for focusing.

In- and out-of-plane propagation of electromagnetic waves in low index contrast two dimensional photonic crystals

2001 ◽  
Vol 89 (2) ◽  
pp. 824-830 ◽  
Author(s):  
S. Foteinopoulou ◽  
A. Rosenberg ◽  
M. M. Sigalas ◽  
C. M. Soukoulis
Keyword(s):  
Photonic Crystals ◽  
Electromagnetic Waves ◽  
Two Dimensional ◽  
Out Of Plane ◽  
Index Contrast

Select Axial-Symmetry Cylinder-Segments as Basic Scattering Units in 2D Photonic Crystals

2013 ◽  
Vol 441 ◽  
pp. 80-83
Author(s):  
Yong Wan ◽  
He Zhang ◽  
Wan Qin Yang ◽  
Chao Li ◽  
Ming Hui Jia
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Axial Symmetry ◽  
Electromagnetic Waves ◽  
Building Blocks ◽  
Two Dimensional ◽  
Photonic Bandgaps ◽  
Crystal Lattices ◽  
Triangular Lattices

Scattering units or building blocks are the basic elements for photonic crystal lattices. Photonic bandgaps can be tuned and improved in two-dimensional (2D) triangular lattices, as well as in square lattices by introducing axial-symmetry cylinder-segments instead of cylinders as basic scattering units. Owing to the changes of bulks, reflectance effect of electromagnetic waves will be different both in TE modes and in TM modes. The widths of bandgaps for the two polarization modes can be adjusted and matched to overlap in some range.

Tunneling of electromagnetic waves in two-dimensional photonic crystals

1993 ◽  
Vol 18 (19) ◽  
pp. 1666 ◽  
Author(s):  
S. Y. Lin ◽  
G. Arjavalingam
Keyword(s):  
Photonic Crystals ◽  
Electromagnetic Waves ◽  
Two Dimensional
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