scholarly journals Fabrications of Terahertz Wave Resonators in Micro Liquid Cells Introduced into Alumina Photonic Crystals with Diamond Structures

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Soshu Kirihara ◽  
Noritoshi Ohta ◽  
Toshiki Niki ◽  
Satoko Tasaki
Keyword(s):  
Photonic Crystals ◽  
Periodic Structures ◽  
Three Dimensional ◽  
Terahertz Wave ◽  
Bragg Diffraction ◽  
Vibration Modes ◽  
Terahertz Waves ◽  
Protein Molecules ◽  
Glass Cell ◽  
And Control

Terahertz wave resonators composed of three-dimensional photonic crystals composed of alumina lattices with diamond structures were designed and fabricated by using microstereolithography process. These three dimensional periodic structures of ceramics can reflect perfectly the terahertz waves through Bragg diffraction. A micro glass cell including water solvents was put between two photonic crystals to realize multiple resonations of terahertz waves to synchronize with various vibration modes of saccharide or protein molecules and control biochemical reactions through electromagnetic excitations.

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.

Smart Processing of Micro Photonic Crystals for Terahertz Wave Control - Freeform Fabrication by Stereolithographic Technique -

2012 ◽  
Vol 706-709 ◽  
pp. 1925-1930 ◽  
Author(s):  
Soshu Kirihara ◽  
Noritoshi Ohta ◽  
Youhei Takinami ◽  
Satoko Tasakai
Keyword(s):  
Photonic Crystals ◽  
Computer Aided Design ◽  
Fine Particles ◽  
Terahertz Wave ◽  
Bragg Diffraction ◽  
Structural Defects ◽  
Transmission Spectra ◽  
Cross Sectional ◽  
Electric Circuits ◽  
Micro Patterning

Photonic crystals with periodically arranged structures of ceramics can reflect light or electromagnetic waves through Bragg diffraction and exhibit forbidden gaps in transmission spectra. We have successfully fabricated micro diamond crystals including twined lattices with plane defects to realize wavelength selections in terahertz frequency ranges. Novel smart processing composed of computer aided design, manufacturing and evaluation was established. The terahertz waves are expected to detect micro cracks in material surfaces and structural defects in electric circuits by fine wave interferences, and to analyze cancer cells in human skins and toxic bacteria in natural foods through high frequency excitations. In the fabrication processes using micro patterning stereo-lithography, the photo sensitive resin paste including alumina fine particles were spread on a glass substrate with 10 µm in layer thickness by moving a knife edge, and cross sectional images of ultra violet ray were exposed by using a digital micro mirror device with 2 µm in part accuracy. Through the layer stacking process, micrometer order structures were formed exactly. Dense ceramic components could be obtained through dewaxing and sintering heat treatments. The electromagnetic wave transmission spectra were measured by terahertz wave spectroscopy. The micro diamond lattices could form perfect photonic band gaps opining for all crystal directions. The introduced plane defects realized the wave select resonations. This resonation behavior was visualized and analyzed by finite difference time domain simulations.

Terahertz wave localization at a three-dimensional ceramic fractal cavity in photonic crystals

2008 ◽  
Vol 103 (10) ◽  
pp. 103106 ◽  
Author(s):  
Yoshinari Miyamoto ◽  
Hideaki Kanaoka ◽  
Soshu Kirihara
Keyword(s):  
Photonic Crystals ◽  
Three Dimensional ◽  
Terahertz Wave ◽  
Wave Localization

scholarly journals Methods for tuning plasmonic and photonic optical resonances in high surface area porous electrodes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lauren M. Otto ◽  
E. Ashley Gaulding ◽  
Christopher T. Chen ◽  
Tevye R. Kuykendall ◽  
Aeron T. Hammack ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Titanium Nitride ◽  
Surface Area ◽  
Periodic Structures ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Porous Electrodes ◽  
Wide Range

AbstractSurface plasmons have found a wide range of applications in plasmonic and nanophotonic devices. The combination of plasmonics with three-dimensional photonic crystals has enormous potential for the efficient localization of light in high surface area photoelectrodes. However, the metals traditionally used for plasmonics are difficult to form into three-dimensional periodic structures and have limited optical penetration depth at operational frequencies, which limits their use in nanofabricated photonic crystal devices. The recent decade has seen an expansion of the plasmonic material portfolio into conducting ceramics, driven by their potential for improved stability, and their conformal growth via atomic layer deposition has been established. In this work, we have created three-dimensional photonic crystals with an ultrathin plasmonic titanium nitride coating that preserves photonic activity. Plasmonic titanium nitride enhances optical fields within the photonic electrode while maintaining sufficient light penetration. Additionally, we show that post-growth annealing can tune the plasmonic resonance of titanium nitride to overlap with the photonic resonance, potentially enabling coupled-phenomena applications for these three-dimensional nanophotonic systems. Through characterization of the tuning knobs of bead size, deposition temperature and cycle count, and annealing conditions, we can create an electrically- and plasmonically-active photonic crystal as-desired for a particular application of choice.

scholarly journals Оптическая анизотропия фотонных кристаллов кубической симметрии, индуцированная многоволновой дифракцией света-=SUP=-*-=/SUP=-

2018 ◽  
Vol 60 (5) ◽  
pp. 914
Author(s):  
Т.А. Уклеев ◽  
Н.Н. Шевченко ◽  
Д.И. Юрасова ◽  
А.В. Селькин
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Bragg Reflection ◽  
Three Dimensional ◽  
Bragg Diffraction ◽  
Multiple Diffraction ◽  
Resonant Enhancement ◽  
Diffraction Of Light ◽  
Monodisperse Polystyrene ◽  
Specific Manifestation

AbstractThe optical spectra of Bragg reflection from opal-like photonic crystals under conditions of the resonant enhancement of the multiple diffraction of light have been studied experimentally and theoretically using the photonic crystal structures prepared of monodisperse polystyrene globules. It is shown that the reflection signal registered in mutually orthogonal configurations of the polarizer and analyzer is related to the intrinsic optical anisotropy of the crystals and is a specific manifestation of the multiple Bragg diffraction in three-dimensional photonic crystals.

Dispersion Engineering of Three-Dimensional Silicon Photonic Crystals: Fabrication and Applications

2004 ◽  
Vol 829 ◽  
Author(s):  
Sriram Venkataraman ◽  
Garrett Schneider ◽  
Janusz Murakowski ◽  
Shouyan Shi ◽  
Dennis W. Prather
Keyword(s):  
Photonic Crystals ◽  
Light Propagation ◽  
Three Dimensional ◽  
Dispersion Engineering ◽  
Silicon Photonic ◽  
Planar Silicon ◽  
Control Light ◽  
Spherical Voids ◽  
And Control ◽  
Interconnect Technology

ABSTRACTIn this paper, we propose the design and fabrication of buried silicon optical interconnect technology, the sub-surface silicon optical bus (S3B). The proposed approach relies on engineering the dispersion properties of embedded silicon three-dimensional photonic crystals to create sub-micron routing channels and control light propagation. Further, we present a method for the fabrication of buried three-dimensional (3D) photonic-crystal structures using conventional planar silicon micromachining. The method utilizes a single planar etch mask coupled with time-multiplexed, sidewall-passivating, deep anisotropic reactive-ion etching, to create an array of spherical voids with three-dimensional symmetry. Preliminary results are presented that demonstrate the feasibility of realizing chip-scale optical interconnects using our proposed approach.

Artificially Induced Defects in Photonic Crystals and their Optical Properties

2013 ◽  
Vol 800 ◽  
pp. 298-301 ◽  
Author(s):  
Juan Li ◽  
Hu Yang ◽  
Yong Qiang Zhao ◽  
Chao Rong Li
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Three Dimensional ◽  
Optical Devices ◽  
Transmission Spectra ◽  
Center Wavelength ◽  
Plan View ◽  
And Control ◽  
Induced Defects ◽  
Photonic Band

An efficient approach for fabricating three-dimensional (3D) photonic crystals (PCs) embedded defects via lithography was introduced. The resulting structures of plan view and cross-section of 3D PCs are characterized by field emission scanning electron microscopy. Ultraviolet-visible transmission spectra show their optical properties. The 3D PCs embedded defects change the center wavelength of photonic band gaps (PBGs) in original PCs, which can be applied in modification and control of the diffraction properties for optical devices.

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