Millimeter Wave Control Using TiO2 Photonic Crystal with Diamond Structure Fabricated by Micro-Stereolithography

2009 ◽  
Vol 631-632 ◽  
pp. 293-298 ◽  
Author(s):  
Masaru Kaneko ◽  
Soshu Kirihara
Keyword(s):  
Band Gap ◽  
Millimeter Wave ◽  
Photonic Band Gap ◽  
Expansion Method ◽  
Diamond Lattice ◽  
Lattice Structures ◽  
Sintering Process ◽  
W Band ◽  
High Dielectric ◽  
Photonic Band

The diamond photonic crystals with the periodic arrangement of high dielectric constant (ε=100) were fabricated, and photonic band gap properties in the millimeter waveguides were investigated. Acrylic diamond lattice structures with TiO2 dispersion at 40 vol. % were fabricated by Micro-stereolithography. The forming accuracy was 10m. After sintering process, TiO2 diamond lattice structures are obtained. The relative density reached 96%. The millimeter wave transmittance properties were measured with network analyzer and W-band millimeter waveguide. The band gap was measured between 90 GHz and 110 GHz in the Γ-X <100> direction, which was well agreed with the results calculated by the plane wave expansion method and simulated by the Transmission Line Modeling method.

Stereolithographic Additive Manufacturing of Diamond Photonic Crystal Composed of Titania and Alumina Micro Lattices

2015 ◽  
Vol 2015 (CICMT) ◽  
pp. 000314-000321
Author(s):  
Soshu Kirihara
Keyword(s):  
Additive Manufacturing ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Terahertz Wave ◽  
Diamond Lattice ◽  
Lattice Structures ◽  
W Band ◽  
Tlm Method ◽  
Localized Mode

Three dimensional micro photonic crystals with a diamond structure made of a dense titania and alumina were fabricated successfully by using stereolithographic additive manufacturing. Photonic band gap properties were investigated in gigahertz and terahertz wave frequency ranges. Acrylic diamond lattice structures with nanometer sized particles of titania and alumina dispersion at 40 vol. % were fabricated by the stereolithography. The forming accuracy was 10 μm. After dewaxing and sintering process, the titania and alumina diamond lattice structures were obtained. The relative density reached above 98 %. Electromagnetic wave transmittances were measured by using a W-band millimeter waveguide connected with a network analyzer and a terahertz wave time domain spectroscopy. In the transmission spectra for the Γ-X &lt;100&gt; direction, a forbidden band was observed at 90 – 110 GHz and 0.4 – 0.6 THz. The band gap frequencies well agreed with calculated results by plane wave expansion (PWE) method. Additionally, simulated results by transmission line modeling (TLM) method indicated that a localized mode can be obtained by introducing a plane defect between twinned diamond lattice structures.

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.

Theoretical Band Gap Analysis of 2-D Triangular Photonic Crystals Fabricated via Multi-Step Interference Lithography

2011 ◽  
Vol 271-273 ◽  
pp. 52-56
Author(s):  
Dong Yao ◽  
Yu Qing Xiong ◽  
Li Chen
Keyword(s):  
Band Gap ◽  
Gap Analysis ◽  
Photonic Band Gap ◽  
Contrast Ratio ◽  
Expansion Method ◽  
Plane Wave Expansion Method ◽  
Intensity Threshold ◽  
Dielectric Contrast ◽  
Photonic Band ◽  
Peak Value

The effect of intensity threshold on the filling ratio was analyzed by calculating the intensity spatial distribution. The photonic band gap properties of two-dimensional triangular lattice fabricated by holographic lithography are investigated numerically. The influences of intensity threshold and dielectric contrast, on photonic gap are comprehensively studied by plane wave expansion method. Calculations of band structure as a function of the intensity threshold show that the PBG of positive structure opens for TM and TE polarization separate, and the negative structure has the complete PBG. The complete PBG does not increase monotonically with dielectric contrast ratio, but has a peak value instead by studying the relation between the complete PBG and the dielectric contrast ratio. The optimal dielectric contrast is 22 when intensity threshold is 0.2.

Micromachined millimeter‐wave photonic band‐gap crystals

1994 ◽  
Vol 64 (16) ◽  
pp. 2059-2061 ◽  
Author(s):  
E. Özbay ◽  
E. Michel ◽  
G. Tuttle ◽  
R. Biswas ◽  
M. Sigalas ◽  
...  
Keyword(s):  
Band Gap ◽  
Millimeter Wave ◽  
Photonic Band Gap ◽  
Photonic Band

Photonic band gap structures for millimeter-wave traveling wave tubes

2006 ◽  
Author(s):  
Aimee G. Bailey ◽  
Evgenya I. Smirnova ◽  
Lawrence M. Earley ◽  
Bruce E. Carlsten ◽  
James L. Maxwell
Keyword(s):  
Band Gap ◽  
Millimeter Wave ◽  
Traveling Wave ◽  
Photonic Band Gap ◽  
Photonic Band Gap Structures ◽  
Traveling Wave Tubes ◽  
Photonic Band

Double‐etch geometry for millimeter‐wave photonic band‐gap crystals

1994 ◽  
Vol 65 (13) ◽  
pp. 1617-1619 ◽  
Author(s):  
E. Özbay ◽  
E. Michel ◽  
G. Tuttle ◽  
R. Biswas ◽  
K. M. Ho ◽  
...  
Keyword(s):  
Band Gap ◽  
Millimeter Wave ◽  
Photonic Band Gap ◽  
Photonic Band

scholarly journals Simulation Studies on Semiconductor Photonic Crystal Using Photonic Bandgap Analysis: A Realization of Optical Mirror

2016 ◽  
Vol 10 (1) ◽  
pp. 150-155
Author(s):  
C. Nayak ◽  
P. Sarkar ◽  
G. Palai
Keyword(s):  
Crystal Structure ◽  
Photonic Crystal ◽  
Band Gap ◽  
Lattice Spacing ◽  
Photonic Bandgap ◽  
Photonic Band Gap ◽  
Expansion Method ◽  
Photonic Crystal Structure ◽  
Photonic Band ◽  
Air Hole

In this research, we attempt to envisage the mirror application using semiconductor photonic crystal with the help of photonic bandgap analysis. The photonic bandgap of photonic crystal structure is simulated using plane wave expansion method, where photonic crystal is realized by 2D triangular photonic crystal structure with gallium arsenide as background material having periodic air holes. Simulation result revealed that both lattice spacing of crystal structure and radius of air holes play vital role in realizing optical mirror. It is observed that photonic band gap of the above structure is found, if radius of air hole varies from 16 nm to 50 nm for lattice constant of 100 nm . It is also seen that photonic band gap is found if lattice spacing varies from 200 nm to 650 nm for radius of air hole of 100 nm.

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