نتایج جستجو برای: reflection coating

تعداد نتایج: 97605  

2016
C. Li S. D. M. Jacques Y. Chen D. Daisenberger P. Xiao N. Markocsan P. Nylen R. J. Cernik

The average residual stress distribution as a function of depth in an air plasma-sprayed yttria stabilized zirconia top coat used in thermal barrier coating (TBC) systems was measured using synchrotron radiation X-ray diffraction in reflection geometry on station I15 at Diamond Light Source, UK, employing a series of incidence angles. The stress values were calculated from data deconvoluted fro...

2017
Rana Biswas Jinho Ahn Taoho Lee Jae-Hwang Lee Yong-Sung Kim Chang-Hwan Kim Wai Y. Leung Kai-Ming Ho Taeho Lee Wai Leung

Polymeric molds of the layer-by-layer photonic crystal can be economically synthesized with a microtransfer molding technique. The refractive indices of these molds are low, preventing formation of a photonic bandgap. We find that such molds can be conformally coated with higher-index material. Photonic band calculations find structures in which conformally coated layer-by-layer molds have comp...

2012
U.Gangopadhyay S. Roy

In this paper, comparative study of p type and n type solar cells are described using two popular solar cell analyzing software AFORS HET and PC1D. We use SiNx layer as Antireflection Coating and a passivated layer Al2O3 .The variation of reflection, absorption, I-V characteristics, and internal and external quantum efficiency have been done by changing the thickness of passivated layer and ARC...

Journal: :Physical review. A, Atomic, molecular, and optical physics 1993
Kwiat Steinberg Chiao Eberhard Petroff

Visible light photon counters (VLPCs) and solid-state photomultipliers (SSPMs) are high-efficiency single-photon detectors which have multi-photon counting capability. While both the VLPCs and the SSPMs have inferred internal quantum efficiencies above 93%, the actual measured values for both the detectors were in fact limited to less than 88%, attributed to in-coupling losses. We are currently...

2016
Gerhard Fritz-Popovski Roland Morak Parvin Sharifi Heinz Amenitsch Oskar Paris

Mesoporous silica films templated by pluronic P123 were prepared using spin and dip coating. The ordered cylindrical structure within the films deforms due to shrinkage during calcination. Grazing-incidence small-angle X-ray scattering (GISAXS) measurements reveal that both the unit cell and the cross section of the pores decrease in size, mainly normal to the surface of the substrate, leading ...

Journal: :Physical review letters 2012
Sukosin Thongrattanasiri Frank H L Koppens F Javier García de Abajo

We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small particles with losses exhibits full absorption under critical-coupling conditions provided the cross section of each individual particle is comparable to the area of the lattice unit cell. Specifically, arrays of doped graphene nanodisks dis...

Journal: :Applied optics 2008
James L Keef John F Clare Kurtis J Thome

An analytical solution to the attenuation of flux within an integrating sphere due to spherical integrating source coating, exit port escape, and atmospheric absorption is derived employing a geometric probability distribution of completed sphere transits. This is used to determine the mean number of completed sphere transits and its variance. Equations that provide the attenuation ratios for t...

2012
P. Theilmann K. M. Chu P. R. Bandaru P. Asbeck S. H. Park

Lightweight, flexible and highly efficient microwave absorbing singlewalled carbon nanotube (SWNT)/polymer composites were fabricated through chemical functionalisation to ensure uniform dispersion of SWNTs in a polymer matrix. These composites were used to fabricate thin electromagnetic absorption coatings, which achieve a maximum reflection loss (RL) magnitude of 24 dB at X-band frequencies. ...

2013
A. A. Miskevich V. A. Loiko B. I. Stepanov

Coherent transmission and reflection coefficients of individual monolayers of spherical alumina particles in the wavelength range from 0.3 to 1.0 μm and multilayers consisting of a set of such monolayers are computed. Quasi-crystalline approximation of the theory for multiple scattering of waves and the transfer matrix method are used. Three types of coherent transmittance minima inherent to cl...

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