scholarly journals Photonic band gap of multiferroic-dielectric materials in the IR region: FDTD method

2019 ◽  
Vol 539 (1) ◽  
pp. 50-54
Author(s):  
Selami Palaz ◽  
Sevket Simsek ◽  
Amirullah M. Mamedov ◽  
Ekmel Ozbay
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Dielectric Materials ◽  
Photonic Band

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.

Topology Optimization of Photonic Band Gap Crystals

2014 ◽  
Vol 553 ◽  
pp. 824-829 ◽  
Author(s):  
Xiao Dong Huang ◽  
Shi Wei Zhou ◽  
Yi Min Xie ◽  
Qing Li
Keyword(s):  
Topology Optimization ◽  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Dielectric Materials ◽  
Transverse Magnetic ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Beso Method ◽  
Photonic Band

This paper proposes a new topology optimization algorithm based on the bi-directional evolutionary structural optimization (BESO) method for the design of photonic band gap crystals. The photonic crystals are assumed to be periodically composed of two given dielectric materials. Based on the finite element analysis, the proposed BESO algorithm gradually re-distributes dielectric materials within the unit cell until the resulting photonic crystals possess a maximal band gap at the desirable frequency level. Numerical examples for both transverse magnetic (TM) and transverse electric (TE) polarizations are presented, and the optimized photonic crystals exhibit novel patterns markedly different from traditional designs of photonic crystals.

Characteristics of 2D Cylindrical Photonic Crystals Band Gap with Square Lattice

2013 ◽  
Vol 712-715 ◽  
pp. 302-305
Author(s):  
Zhao Xia Wu ◽  
Wen Chao Li ◽  
Er Dan Gu ◽  
Li Fu Wang
Keyword(s):  
Dielectric Constant ◽  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Dielectric Constants ◽  
Square Lattice ◽  
The Difference ◽  
Difference Time ◽  
Photonic Band

The structure of two-dimensional (2D) photonic crystals (PCs) with square lattice is proposed in this paper, and researches on characteristics of photonic band gap (PBG) are conducted using finite difference time domain (FDTD) method, then the effects of the dielectric constant and the radius of dielectric rods on band gap are analysed, dielectric rods in air (rods/air). The research results indicate that in the case of TE and TM polarization mode, the difference value of dielectric constant of medium and dielectric rods affects forming PBG.The band gap broadens with the difference value increasing. Whats more, the complete band gap (CBG) appears in range of large rods radius structure when dielectric constants of rods are smaller than that of medium.

Materials for Freeform Fabrication of GHz Tunable Dielectric Photonic Crystals

2002 ◽  
Vol 758 ◽  
Author(s):  
Paul G. Clem ◽  
James F. Carroll ◽  
Michael K. Niehaus ◽  
Joseph Cesarano ◽  
James E. Smay ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Dielectric Materials ◽  
Ceramic Composites ◽  
Processing Route ◽  
Solid Loading ◽  
Dielectric Characterization ◽  
High Tunability ◽  
Photonic Band

ABSTRACTPhotonic crystals are of interest for GHz transmission applications, including rapid switching, GHz filters, and phased-array technology. 3D fabrication by Robocasting enables moldless printing of high solid loading slurries into structures such as the “woodpile” structures used to fabricate dielectric photonic band gap crystals. In this work, tunable dielectric materials were developed and printed into woodpile structures via solid freefrom fabrication (SFF) toward demonstration of tunable photonic crystals. Barium strontium titanate ceramics possess interesting electrical properties including high permittivity, low loss, and high tunability. This paper discusses the processing route and dielectric characterization of (BaxSr1-XTiO3):MgO ceramic composites, toward fabrication of tunable dielectric photonic band gap crystals.

Analysis of photonic band-gap (PBG) structures using the FDTD method

2004 ◽  
Vol 41 (3) ◽  
pp. 173-177 ◽  
Author(s):  
Ming-Sze Tong ◽  
Min Cheng ◽  
Yilong Lu ◽  
Yinchao Chen ◽  
Viktor Krozer ◽  
...  
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Fdtd Method ◽  
Photonic Band

A Natural Humidity Sensitive Two-dimensional Tunable Photonic Band Gap Material and its Optic Properties

2009 ◽  
Vol 24 (1) ◽  
pp. 57-60 ◽  
Author(s):  
Wei-Gang ZHANG ◽  
Jun YAN ◽  
Gang WANG ◽  
Hao-Xuan LI ◽  
Gang-Sheng ZHANG
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Two Dimensional ◽  
Photonic Band Gap Material ◽  
Photonic Band
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