A new face-centered-cubic photonic crystal for microwave and millimeter-wave applications

1994 ◽  
Vol 7 (17) ◽  
pp. 777-779 ◽  
Author(s):  
E. R. Brown ◽  
K. Agl ◽  
C. Dill ◽  
C. D. Parker ◽  
K. J. Malloy
Keyword(s):  
Photonic Crystal ◽  
Millimeter Wave ◽  
Face Centered Cubic ◽  
Face Centered

Raman Hyperspectral Imaging Spectrometer Utilizing Crystalline Colloidal Array Photonic Crystal Diffraction

2014 ◽  
Vol 68 (11) ◽  
pp. 1219-1223 ◽  
Author(s):  
Kyle T. Hufziger ◽  
Sergei V. Bykov ◽  
Sanford A. Asher
Keyword(s):  
Photonic Crystal ◽  
Incident Angle ◽  
Scattered Light ◽  
Sample Surface ◽  
Spectral Interval ◽  
Face Centered Cubic ◽  
Imaging Spectrometer ◽  
Narrow Region ◽  
Face Centered ◽  
A Charge

We fabricated a novel hyperspectral Raman imaging spectrometer that, for the first time, uses a photonic-crystal wavelength-selecting device to select a narrow-wavelength spectral interval. The photonic crystal consists of an array of highly charged, monodisperse polystyrene particles that self-assemble into a face-centered cubic crystal. The photonic crystal Bragg-diffracts a narrow spectral interval that can be tuned by altering the incident angle of collimated Raman scattered light. Our prototype spectrometer diffracts a ∼200 cm−1 interval of the 488 nm excited visible Raman spectrum of Teflon. This enabled us to select a close-lying triplet of Teflon Raman bands. We imaged the Teflon surface by focusing this narrow region onto a charge-coupled device to create a Raman image of the sample surface that spectrally details the chemical composition.

A three-dimensional photonic crystal model: Hollow-spherical non-closed-packed face-centered cubic structure

2006 ◽  
Vol 381 (1-2) ◽  
pp. 289-293 ◽  
Author(s):  
Hong-Bo Chen ◽  
Yan-Ling Cao ◽  
Yong-Zheng Zhu ◽  
Yan-Ping Wang ◽  
Yuan-Bin Chi
Keyword(s):  
Photonic Crystal ◽  
Three Dimensional ◽  
Face Centered Cubic ◽  
Dimensional Photonic Crystal ◽  
Crystal Model ◽  
Cubic Structure ◽  
Face Centered

Applications and Characterization of a New Face-Centered-Cubic Photonic Crystal

1995 ◽  
pp. 485-494
Author(s):  
K. Agi ◽  
E. R. Brown ◽  
C. D. Dill ◽  
K. A. McIntosh ◽  
O. B. McMahon ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Face Centered Cubic ◽  
Face Centered

Optical Properties of Three-Dimensional Photonic Crystal with Face-Centered-Cubic Structure

2013 ◽  
Vol 821-822 ◽  
pp. 622-625 ◽  
Author(s):  
Hong Bo Zhang ◽  
Xiao Yan Liu ◽  
Wei Dong Yu
Keyword(s):  
Optical Properties ◽  
Photonic Crystal ◽  
Incident Angle ◽  
Three Dimensional ◽  
Structural Color ◽  
Face Centered Cubic ◽  
Microsphere Size ◽  
Cubic Structure ◽  
Face Centered ◽  
Fcc Structure

Based on transfer matrix method (TMM), the model and calculation of 3-D Photonic Crystal with Face-Centered-Cubic (FCC) Structure are presented. The microsphere size, the crystal stack thickness and the incident angle have an influence on optical properties of 3-D Photonic Crystal. With the microsphere size increasing, the wavelength corresponding to the positions of PBG becomes larger causing structural color changing from blue to red. The reflectivity becomes higher and PBG is narrower when the crystal stack thickness increases. With the incident angle becoming larger, the reflectivity does not change significantly, while the wavelength corresponding to the positions of PBG becomes shorter causing structural color changing from red to blue.

Ultraviolet Raman Wide-Field Hyperspectral Imaging Spectrometer for Standoff Trace Explosive Detection

2016 ◽  
Vol 71 (2) ◽  
pp. 173-185 ◽  
Author(s):  
Kyle T. Hufziger ◽  
Sergei V. Bykov ◽  
Sanford A. Asher
Keyword(s):  
Photonic Crystal ◽  
Wide Field ◽  
Face Centered Cubic ◽  
Experimental Conditions ◽  
Imaging Spectrometer ◽  
Uv Raman ◽  
Crystalline Colloidal Array ◽  
Deep Uv ◽  
Face Centered ◽  
Raman Spectral

We constructed the first deep ultraviolet (UV) Raman standoff wide-field imaging spectrometer. Our novel deep UV imaging spectrometer utilizes a photonic crystal to select Raman spectral regions for detection. The photonic crystal is composed of highly charged, monodisperse 35.5 ± 2.9 nm silica nanoparticles that self-assemble in solution to produce a face centered cubic crystalline colloidal array that Bragg diffracts a narrow ∼1.0 nm full width at half-maximum (FWHM) UV spectral region. We utilize this photonic crystal to select and image two different spectral regions containing resonance Raman bands of pentaerythritol tetranitrate (PETN) and NH4NO3 (AN). These two deep UV Raman spectral regions diffracted were selected by angle tuning the photonic crystal. We utilized this imaging spectrometer to measure 229 nm excited UV Raman images containing ∼10–1000 µg/cm2 samples of solid PETN and AN on aluminum surfaces at 2.3 m standoff distances. We estimate detection limits of ∼1 µg/cm2 for PETN and AN films under these experimental conditions.

FDTD Simulation of Inverse 3-D Face-Centered Cubic Photonic Crystal Cavities

2011 ◽  
Vol 47 (12) ◽  
pp. 1480-1492 ◽  
Author(s):  
Y. D. Ho ◽  
P. S. Ivanov ◽  
E. Engin ◽  
M. F. J. Nicol ◽  
M. P. C. Taverne ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fdtd Simulation ◽  
Face Centered Cubic ◽  
Photonic Crystal Cavities ◽  
Face Centered

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

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