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.

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.

3-Dimensional Photonic Crystals at Optical Wavelengths

1998 ◽  
Vol 07 (02) ◽  
pp. 181-200 ◽  
Author(s):  
S. G. Romanov
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Stop Band ◽  
High Refractive Index ◽  
3 Dimensional ◽  
Optical Wavelength ◽  
Photonic Band Gap Materials ◽  
Optical Wavelengths ◽  
Photonic Band

Different experimental strategies towards the 3-dimensional photonic crystals operating at optical wavelength are classified. The detailed discussion is devoted to the recent progress in photonic crystals fabricated by template method — the photonic band gap materials on the base of opal. The control of photonic properties of opal-based gratings is achieved through impregnating the opal with high refractive index semiconductors and dielectrics. Experimental study demonstrated the dependence of the stop band behaviour upon the type of impregnation (complete or partial) and showed a way for approaching complete photonic band gap. The photoluminescence from opal- semiconductor gratings revealed suppression of spontaneous emission in the gap region with following enhancement of the emission efficiency at the low-energy edge of the gap.

scholarly journals Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 651 ◽  
Author(s):  
Ermolaev ◽  
Kushnir ◽  
Sapoletova ◽  
Napolskii
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Band Gap ◽  
Titanium Oxide ◽  
Effective Refractive Index ◽  
Photonic Band Gap ◽  
Voltage Versus ◽  
Research Attention ◽  
Anodic Titanium Oxide ◽  
Photonic Band

Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO2. One of the promising routes to prepare photonic crystals based on titanium oxide is titanium anodizing at periodically changing voltage or current. However, precise control of the photonic band gap position in anodic titania films is a challenge. To solve this problem, systematic data on the effective refractive index of the porous anodic titanium oxide are required. In this research, we determine quantitatively the dependence of the effective refractive index of porous anodic titanium oxide on the anodizing regime and develop a model which allows one to predict and, therefore, control photonic band gap position in the visible spectrum range with an accuracy better than 98.5%. The prospects of anodic titania photonic crystals implementation as refractive index sensors are demonstrated.

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

Photonic band gap effect in layer-by-layer metallic photonic crystals

2003 ◽  
Vol 93 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Zhi-Yuan Li ◽  
I. El-Kady ◽  
Kai-Ming Ho ◽  
S. Y. Lin ◽  
J. G. Fleming
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Gap Effect ◽  
Layer By Layer ◽  
Metallic Photonic Crystals ◽  
Photonic Band
Sign in / Sign up

Export Citation Format

Share Document