Infrared-Optical Characterization of Metallic Island Films

1997 ◽  
Vol 51 (6) ◽  
pp. 902-904 ◽  
Author(s):  
Arnulf Röseler ◽  
Ernst-Heiner Korte
Keyword(s):  
Infrared Spectra ◽  
Infrared Absorption ◽  
Optical Constants ◽  
Optical Characterization ◽  
Effective Medium ◽  
Island Film ◽  
Surface Enhanced ◽  
Effective Medium Approach ◽  
Island Films

The ellipsometric infrared spectra of a metallic island film indicate its potential for surface-enhanced infrared absorption (SEIRA). Such a film is characterized by unique optical constants, and these can be simulated by using an effective-medium approach.

scholarly journals Machine learning powered ellipsometry

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jinchao Liu ◽  
Di Zhang ◽  
Dianqiang Yu ◽  
Mengxin Ren ◽  
Jingjun Xu
Keyword(s):  
Machine Learning ◽  
Optical Constants ◽  
Optical Characterization ◽  
Superior Performance ◽  
Trial And Error ◽  
Powerful Method ◽  
Human In The Loop ◽  
Ill Posed ◽  
Fully Automatic

AbstractEllipsometry is a powerful method for determining both the optical constants and thickness of thin films. For decades, solutions to ill-posed inverse ellipsometric problems require substantial human–expert intervention and have become essentially human-in-the-loop trial-and-error processes that are not only tedious and time-consuming but also limit the applicability of ellipsometry. Here, we demonstrate a machine learning based approach for solving ellipsometric problems in an unambiguous and fully automatic manner while showing superior performance. The proposed approach is experimentally validated by using a broad range of films covering categories of metals, semiconductors, and dielectrics. This method is compatible with existing ellipsometers and paves the way for realizing the automatic, rapid, high-throughput optical characterization of films.

SYNTHESIS AND OPTICAL CHARACTERIZATION OF PYROELECTRIC NANOPOWDERS BASED ON PZT (95/5)

2010 ◽  
Vol 09 (03) ◽  
pp. 193-199 ◽  
Author(s):  
E. PAKIZEH ◽  
S. M. HOSSEINI ◽  
A. KOMPANY ◽  
M. GHASEMIFARD
Keyword(s):  
Low Temperatures ◽  
Optical Constants ◽  
Sol Gel ◽  
Normal Incidence ◽  
Optical Characterization ◽  
Analysis Program ◽  
Secondary Phases ◽  
Ir Reflectance ◽  
Gel Technique

Pb(Zr1-x, Tix)O3 (x = 0.05) with pyroelectric properties have been synthesized by sol–gel technique at low temperatures. XRD results indicate that the powder has perovskite structure without secondary phases and the average of particle size was estimated to be about 40 nm in diameters. The optical constants such as refractive index, n, extinction coefficient, k, and the dielectric function of PZT nanopowders have been investigated by Fourier transmittance infrared (FTIR) spectrum and Kramers–Kronig (KK) analysis program. The use of the KK method to analyze the normal incidence infrared (IR) reflectance spectra with a single resonance has also been described. The results indicated that the optical constant increases slowly as temperature of calcinations increases.

Characterization of SiO2-Overcoated Silver-Island Films as Substrates for Surface-Enhanced Raman Scattering

1996 ◽  
Vol 68 (6) ◽  
pp. 1003-1011 ◽  
Author(s):  
William B. Lacy ◽  
John M. Williams ◽  
Lisa A. Wenzler ◽  
Thomas P. Beebe ◽  
Joel M. Harris
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Silver Island Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Silver Island ◽  
Enhanced Raman Scattering ◽  
Island Films
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