Selective Transmission of Electromagnetic Wave by Using Diamond Photonic Crystals with Graded Lattice Spacing

2006 ◽  
Vol 45 ◽  
pp. 1139-1144
Author(s):  
Soshu Kirihara ◽  
Yoshinari Miyamoto
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Electromagnetic Waves ◽  
Lattice Spacing ◽  
Three Dimensional ◽  
Dielectric Constants ◽  
Microwave Antenna ◽  
Diamond Structure ◽  
Band Calculation ◽  
Graded Lattice

Three-dimensional electromagnetic or photonic crystals with periodic variations of the dielectric constants were fabricated by using a rapid prototyping method called stereolithography. Millimeter-order epoxy lattices with a diamond structure were designed to reflect electromagnetic waves by forming an electromagnetic band gap in GHz range. Titania based ceramic particles were dispersed into the lattice to control the dielectric constant. The diamond lattice structures formed the perfect band gap reflecting electromagnetic waves for all directions. The location of the band gap agreed with the band calculation using the plane wave propagation method. The diamond structures with graded lattice spacing were successfully fabricated as well, resulting in the directional transmission of microwaves. The stretching ratio of the lattice spacing in the crystal structure was changed according to the electromagnetic band calculation. A microwave antenna head composed of the diamond structure with graded lattice spacing was fabricated which achieved the unidirectional transmission.

Electromagnetic properties of photonic crystals with diamond structure containing defects

2003 ◽  
Vol 18 (9) ◽  
pp. 2214-2220 ◽  
Author(s):  
Shingo Kanehira ◽  
Soshu Kirihara ◽  
Yoshinari Miyamoto ◽  
Kazuaki Sakoda ◽  
Mitsuo Wada Takeda
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Expansion Method ◽  
Electromagnetic Properties ◽  
Diamond Structure ◽  
Multiple Reflections ◽  
Air Cavity ◽  
Photonic Band

Three-dimensional photonic crystals with a diamond structure, which are composed of the TiO2-based ceramic particles dispersed in an epoxy lattice, were fabricated by stereolithography. The diamond structure showed a photonic band gap in the 14.3–17.0 GHz range along the Γ-K 〈110〉 direction, which is close to the band calculation using the plain wave expansion method. Two types of lattice defects—air cavity and dielectric cavity—were introduced into the diamond structure by removing a unit cell of diamond structure or inserting a block of the lattice medium into the air cavity. The transmission of millimeter waves affected by multiple reflections at the defects was measured in the photonic band gap. Resonant frequencies in the defects were calculated and compared with the measurement results.

Terahertz Wave Properties of Ceramic Photonic Crystals with Graded Structure Fabricated by Using Micro-Stereolithography

2009 ◽  
Vol 631-632 ◽  
pp. 299-304 ◽  
Author(s):  
Soshu Kirihara ◽  
Toshiki Niki ◽  
Masaru Kaneko
Keyword(s):  
Electromagnetic Wave ◽  
Photonic Crystals ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Expansion Method ◽  
Terahertz Wave ◽  
Diamond Structure ◽  
Terahertz Time Domain Spectroscopy ◽  
3D Cad ◽  
Wave Properties

Fabrication and terahertz wave properties of alumina micro photonic crystals with a diamond structure were investigated. The three-dimensional diamond structure was designed on a computer using 3D-CAD software. Acrylic diamond structures with alumina particles dispersion were formed by using micro-stereolithography. Fabricated precursors were dewaxed and sintered in the air. The electromagnetic wave properties were measured by terahertz time-domain spectroscopy. A complete photonic band gap was observed at the frequency range from 0.40 to 0.47 THz, and showed good agreement with the simulation results calculated by the plane wave expansion method. Moreover, a localized mode was obtained by introducing a plane defect between twinned diamond structures. The one-way transmission of the electromagnetic wave was realized by using this twinned photonic crystal with the graded diamond structure. They corresponded to the simulation by the transmission line modeling (TLM) method.

scholarly journals Signature of a three-dimensional photonic band gap observed on silicon inverse woodpile photonic crystals

2011 ◽  
Vol 83 (20) ◽  
Author(s):  
Simon R. Huisman ◽  
Rajesh V. Nair ◽  
Léon A. Woldering ◽  
Merel D. Leistikow ◽  
Allard P. Mosk ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Photonic Band

Spontaneous emission in three-dimensional photonic crystals with an incomplete band gap

2003 ◽  
Vol 62 (2) ◽  
pp. 210-216 ◽  
Author(s):  
S. Y Zhu ◽  
G. X Li ◽  
Y. P Yang ◽  
F. L Li
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Spontaneous Emission ◽  
Three Dimensional

Effect of point defects on band-gap properties in diamond structure photonic crystals

2012 ◽  
Vol 111 (2) ◽  
pp. 023515 ◽  
Author(s):  
Wei Dai ◽  
Hong Wang ◽  
Shibin Chen ◽  
Dichen Li ◽  
Di Zhou
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Point Defects ◽  
Diamond Structure

Emission Control of Electromagnetic Wave by Using Diamond Photonic Crystals with Graded Lattice Spacing

2003 ◽  
Vol 423-425 ◽  
pp. 785-790 ◽  
Author(s):  
Soshu Kirihara ◽  
Mitsuo Wada Takeda ◽  
Kazuaki Sakoda ◽  
Y. Miyamoto
Keyword(s):  
Electromagnetic Wave ◽  
Photonic Crystals ◽  
Lattice Spacing ◽  
Emission Control ◽  
Graded Lattice
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