Anomalous Absorption in Optical Coatings

2009 ◽  
pp. 515-515-14
Author(s):  
MR Lange ◽  
JK McIver ◽  
AH Guenther
Keyword(s):  
Optical Coatings ◽  
Anomalous Absorption

LACBED with Quantitative Anomalous Absorption Corrections

1990 ◽  
Vol 48 (2) ◽  
pp. 528-529
Author(s):  
C.J. Rossouw ◽  
L.J. Allen ◽  
P.R. Miller
Keyword(s):  
Momentum Transfer ◽  
Scattering Amplitude ◽  
Incident Beam ◽  
Waller Factor ◽  
Beam Momentum ◽  
Anomalous Absorption ◽  
Quantitative Calculation ◽  
Ewald Sphere ◽  
Image Position ◽  
Incident Beam Energy

An Einstein model for thermal diffuse scattering (TDS) has enabled quantitative calculation of the absorptive potential V'(r). This allows anomalous absorption to be accounted for in LACBED contrast. Fourier coefficients Vg-h of the absorptive component from each atom α are calculated from integrals of the formwhere fα is the scattering amplitude and M(Q) the Debye-Waller factor. Integration over the Ewald sphere (dΩ) requires the momentum transfer q to have values up to 2ko (the incident beam momentum). Dynamical ‘dechannelling’ is accounted for by the terms g ≠ h. The crystal absorptive potential is obtained by coherently summing over these atomic absorptive potentials within the unit cell. Unlike the elastic potential, the absorptive potential is a strong function of incident beam energy Eo, since the range of momentum transfer q and associated solid angles dΩ change with the Ewald sphere radius.Fig. 1 shows a LACBED pattern of the zeroth order beam from Si aligned along a <001> zone axis.

PECVD Synthesis of Flexible Optical Coatings for Renewable Energy Applications

2015 ◽  
Vol 13 (1) ◽  
pp. 184-190 ◽  
Author(s):  
Thomas F. Fuerst ◽  
Matthew O. Reese ◽  
Colin A. Wolden
Keyword(s):  
Renewable Energy ◽  
Optical Coatings ◽  
Energy Applications

Theoretical and experimental analysis of the laser irradiation parameters influence on the LIDT of optical coatings

2008 ◽  
Author(s):  
Laurent Gallais ◽  
Jérémie Capoulade ◽  
Jean-Yves Natoli ◽  
Mireille Commandré
Keyword(s):  
Laser Irradiation ◽  
Experimental Analysis ◽  
Optical Coatings

scholarly journals Quality and reliability of optical coatings

1986 ◽  
Vol 8 (3) ◽  
pp. 351-355 ◽  
Author(s):  
C L Nagendra ◽  
G K M Thutupalli
Keyword(s):  
Optical Coatings ◽  
Quality And Reliability
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