Fabrication of Metal Photonic Crystals with Graded Lattice Spacing by Using Micro-Stereolithography

2009 ◽  
Vol 631-632 ◽  
pp. 287-292 ◽  
Author(s):  
Daisuke Sano ◽  
Soshu Kirihara
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Time Domain ◽  
Lattice Spacing ◽  
Pure Copper ◽  
Sintering Process ◽  
Micro Scale ◽  
Transmission Properties ◽  
Graded Lattice ◽  
Thz Waves

We designed micro-scale photonic crystal with or without graded lattice spacing composed of copper to control Terahertz (THz) waves. Designed structures were fabricated by using micro-stereolithography. By proper dewaxing and sintering process, pure copper photonic crystals were obtained. Transmission properties of THz waves propagating through the photonic crystals were measured by THz time-domain spectroscopy. Measured results showed good agreements with the simulated results.

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.

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

scholarly journals Analysis of photonic crystal transmission properties by the precise integration time domain

2017 ◽  
Vol 66 (8) ◽  
pp. 084101
Author(s):  
Yang Hong-Wei ◽  
Meng Shan-Shan ◽  
Gao Ran-Ran ◽  
Peng Shuo
Keyword(s):  
Photonic Crystal ◽  
Time Domain ◽  
Integration Time ◽  
Precise Integration ◽  
Transmission Properties

Simulations of Sub-wavelength Metallo-dielectric Photonic Crystals for Gas Sensing

2006 ◽  
Vol 952 ◽  
Author(s):  
Rana Biswas ◽  
Irina Puscasu ◽  
Martin Pralle ◽  
Martin McNeal ◽  
Anton Greenwald ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Lattice Spacing ◽  
Gas Sensing ◽  
Metal Layer ◽  
Scattering Matrix ◽  
Infrared Region ◽  
Hole Array ◽  
Guided Mode ◽  
Sub Wavelength

ABSTRACTWe have simulated metallo-dielectric photonic crystals that are sharp thermal emitters at infrared wavelengths, and are being employed in gas sensors. The simulations were performed with a rigorous scattering matrix approach where Maxwell's equations are solved in Fourier space. These metallo-dielectric photonic crystals consist of a sub-wavelength hole array in a metal layer coupled to a two-dimensional photonic crystal of the same periodicity. The sub-wavelength hole array has an enhanced transmission mode that couples to a guided mode of the photonic crystal. The transmissive mode of the hole array is absorbed by the photonic crystal to create a sharp absorption and reflective minimum feature found for a range of lattice spacing. The structure thermally emits in a narrow band of wavelengths controlled by the lattice spacing that can be tuned over the infrared region. The underlying physics of this emissive device is modeled with rigorous scattering matrix simulations.

scholarly journals Simulation of Optical Properties of Si Photonic Crystals

2014 ◽  
Vol 38 ◽  
pp. 87-98
Author(s):  
K.A.I.L. Wijewardena Gamalath ◽  
W.A.S.C. Settinayake
Keyword(s):  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Photonic Crystal Waveguides ◽  
Telecommunication Wavelength ◽  
Set Up ◽  
Difference Time ◽  
Lattice Approach

To investigate optical properties of Si photonic crystal waveguides, a mathematical model was set up. Finite difference time domain method was used to calculate the Maxwell’s equations numerically. For the evolution of the electromagnetic fields in the photonic crystals, simulations were done for a small lattices using Yee lattice approach. The properties of a waveguide and a power divider were investigated for 3λx3λ photonic crystal formed from Si circular rods in air for telecommunication wavelength 1.55 µm. The model developed was satisfactory in predicting the behaviour of light in linear photonic crystals

Simulation of Broadband Transmission Photonic Crystal Waveguide Crossing with Linear Taper

2013 ◽  
Vol 479-480 ◽  
pp. 133-136
Author(s):  
Yih Bin Lin ◽  
Rei Shin Chen ◽  
Ting Chung Yu ◽  
Ju Feng Liu
Keyword(s):  
Photonic Crystal ◽  
Finite Difference ◽  
Cross Talk ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Transmission Band ◽  
Time Domain Method ◽  
Photonic Crystal Waveguide ◽  
Difference Time ◽  
Novel Design

A novel design of photonic crystal waveguide crossing with taper structure is proposed. Simulations are performed by finite-difference time-domain method. The results show the proposed design has both high transmission and low cross talk characteristics. The transmission band and low cross talk band can be tuned to match each other by adjusting the taper structure..

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