Determination of the optical function n(λ) of vitreous silica by spectroscopic ellipsometry with an achromatic compensator

1993 ◽  
Vol 32 (31) ◽  
pp. 6391 ◽  
Author(s):  
P. Chindaudom ◽  
K. Vedam
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Vitreous Silica ◽  
Optical Function

scholarly journals Optical Characterization of Ultra-Thin Films of Azo-Dye-Doped Polymers Using Ellipsometry and Surface Plasmon Resonance Spectroscopy

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Najat Andam ◽  
Siham Refki ◽  
Hidekazu Ishitobi ◽  
Yasushi Inouye ◽  
Zouheir Sekkat
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Spectroscopic Ellipsometry ◽  
Plasmon Resonance ◽  
Complex Refractive Index ◽  
Resonance Spectroscopy ◽  
Doped Polymers

The determination of optical constants (i.e., real and imaginary parts of the complex refractive index (nc) and thickness (d)) of ultrathin films is often required in photonics. It may be done by using, for example, surface plasmon resonance (SPR) spectroscopy combined with either profilometry or atomic force microscopy (AFM). SPR yields the optical thickness (i.e., the product of nc and d) of the film, while profilometry and AFM yield its thickness, thereby allowing for the separate determination of nc and d. In this paper, we use SPR and profilometry to determine the complex refractive index of very thin (i.e., 58 nm) films of dye-doped polymers at different dye/polymer concentrations (a feature which constitutes the originality of this work), and we compare the SPR results with those obtained by using spectroscopic ellipsometry measurements performed on the same samples. To determine the optical properties of our film samples by ellipsometry, we used, for the theoretical fits to experimental data, Bruggeman’s effective medium model for the dye/polymer, assumed as a composite material, and the Lorentz model for dye absorption. We found an excellent agreement between the results obtained by SPR and ellipsometry, confirming that SPR is appropriate for measuring the optical properties of very thin coatings at a single light frequency, given that it is simpler in operation and data analysis than spectroscopic ellipsometry.

scholarly journals Determination of the Thickness and Optical Constants of ZrO2 by Spectroscopic Ellipsometry and Spectrophotometric Method

2011 ◽  
Vol 8 ◽  
pp. 223-227 ◽  
Author(s):  
R. Yusoh ◽  
M. Horprathum ◽  
P. Eiamchai ◽  
S. Chanyawadee ◽  
K. Aiempanakit
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Spectrophotometric Method ◽  
Optical Constants

Accurate Determination of Optical Constants of Amorphous Absorbing Thin Films by Spectroscopic Ellipsometry

2015 ◽  
Vol 35 (4) ◽  
pp. 0431001 ◽  
Author(s):  
李江 Li Jiang ◽  
李沛 Li Pei ◽  
黄峰 Huang Feng ◽  
魏贤华 Wei Xianhua ◽  
葛芳芳 Ge Fangfang ◽  
...  
Keyword(s):  
Thin Films ◽  
Spectroscopic Ellipsometry ◽  
Optical Constants ◽  
Accurate Determination

Spectroscopic Ellipsometry of the Optical Functions of Some Widely Used Organic Light Emitting Diodes (OLEDs) Materials.

2005 ◽  
Vol 871 ◽  
Author(s):  
Z. T. Liu ◽  
C. C. Oey ◽  
A. B. Djuriši ◽  
C. Y. Kwong ◽  
C. H. Cheung ◽  
...  
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Indium Tin Oxide ◽  
High Vacuum ◽  
Light Emitting ◽  
Glass Substrates ◽  
Optical Functions ◽  
Conducting Materials ◽  
Ito Glass ◽  
Polystyrene Sulfonic Acid

AbstractIn this work, optical functions of some widely used OLEDs materials 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), tris (8-hydroxyquinoline) aluminum (Alq3), (N,N′-di(naphthalene-1-yl)-N,N′- diphenylbenzidine (NPB),poly(3,4,-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS) and indium tin oxide (ITO)) were studied using spectroscopic ellipsometry (SE) in the spectral range from 1.55 eV to 4.1 eV (wavelength range of 300 nm to 800 nm). The samples were prepared either by thermal evaporation in high vacuum or spin-coating of thin films onto glass substrates. For determination of the optical functions of ITO, commercial ITO glass was used. Measurements at different incident angles were performed to determine whether the samples can be considered isotropic. The SE data were modeled using an oscillator model (Lorentz for semiconducting and Lorentz-Drude for conducting materials). The absorption spectra were also measured, and the comparison with the data determined by SE is given.

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