scholarly journals Study on Optical Constants and Refractive Index Dispersion of Neutral red Doped Polymer Film

2012 ◽  
Vol 9 (2) ◽  
pp. 250-253 ◽  
Author(s):  
Santana
Keyword(s):  
Refractive Index ◽  
Polymer Film ◽  
Optical Constants ◽  
Neutral Red ◽  
Refractive Index Dispersion ◽  
Doped Polymer

The refractive index dispersion and the optical constants of liquid crystal metal-free and nickel(II) phthalocyanines

2006 ◽  
Vol 373 (2) ◽  
pp. 262-266 ◽  
Author(s):  
F. Yakuphanoglu ◽  
M. Durmuş ◽  
M. Okutan ◽  
O. Köysal ◽  
V. Ahsen
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Optical Constants ◽  
Refractive Index Dispersion ◽  
Metal Free

Loss characterization in rhodamine 6G doped polymer film waveguide by side illumination fluorescence

2004 ◽  
Vol 6 (4) ◽  
pp. 379-383 ◽  
Author(s):  
K Geetha ◽  
M Rajesh ◽  
V P N Nampoori ◽  
C P G Vallabhan ◽  
P Radhakrishnan
Keyword(s):  
Polymer Film ◽  
Rhodamine 6G ◽  
Doped Polymer ◽  
Side Illumination

Refractive index dispersion and its temperature dependence in GaS

1983 ◽  
Vol 99 (9) ◽  
pp. 437-440 ◽  
Author(s):  
H. Neumann ◽  
M. Lorenz ◽  
W. Hörig ◽  
F. Lévy
Keyword(s):  
Refractive Index ◽  
Temperature Dependence ◽  
Refractive Index Dispersion

Soft X-ray refractive index by reconciling total electron yield with specular reflection: experimental determination of the optical constants of graphite

2018 ◽  
Vol 25 (5) ◽  
pp. 1433-1443
Author(s):  
C. Jansing ◽  
H. Wahab ◽  
H. Timmers ◽  
A. Gaupp ◽  
H.-C. Mertins
Keyword(s):  
Refractive Index ◽  
Optical Constants ◽  
Specular Reflection ◽  
Complex Refractive Index ◽  
Reflection Spectra ◽  
Total Electron Yield ◽  
Total Electron ◽  
X Ray ◽  
Electron Yield ◽  
Saturation Effects

The complex refractive index of many materials is poorly known in the soft X-ray range across absorption edges. This is due to saturation effects that occur there in total-electron-yield and fluorescence-yield spectroscopy and that are strongest at resonance energies. Aiming to obtain reliable optical constants, a procedure that reconciles electron-yield measurements and reflection spectroscopy by correcting these saturation effects is presented. The procedure takes into account the energy- and polarization-dependence of the photon penetration depth as well as the creation efficiency for secondary electrons and their escape length. From corrected electron-yield spectra the absorption constants and the imaginary parts of the refractive index of the material are determined. The real parts of the index are subsequently obtained through a Kramers–Kronig transformation. These preliminary optical constants are refined by simulating reflection spectra and adapting them, so that measured reflection spectra are reproduced best. The efficacy of the new procedure is demonstrated for graphite. The optical constants that have been determined for linearly polarized synchrotron light incident with p- and s-geometry provide a detailed and reliable representation of the complex refractive index of the material near π- and σ-resonances. They are also suitable for allotropes of graphite such as graphene.

scholarly journals Optical constants of sputtered beryllium thin films determined from photoabsorption measurements in the spectral range 20.4–250 eV

2020 ◽  
Vol 27 (1) ◽  
pp. 75-82
Author(s):  
Mikhail Svechnikov ◽  
Nikolay Chkhalo ◽  
Alexey Lopatin ◽  
Roman Pleshkov ◽  
Vladimir Polkovnikov ◽  
...  
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Synchrotron Radiation ◽  
Initial Data ◽  
Absorption Coefficient ◽  
Energy Range ◽  
Transmission Coefficient ◽  
Radiation Source ◽  
Optical Constants ◽  
Free Standing

In this work, the refractive index of beryllium in the photon energy range 20.4–250 eV was experimentally determined. The initial data include measurements of the transmittance of two free-standing Be films with thicknesses of 70 nm and 152 nm, as well as reflectometric measurements of similar films on a substrate. Measurements were carried out at the optics beamline of the BESSY II synchrotron radiation source. The absorption coefficient β was found directly from the transmission coefficient of the films, and the real part of the polarizability δ was calculated from the Kramers–Kronig relations. A comparison is carried out with results obtained 20 years ago at the ALS synchrotron using a similar methodology.

All-optical switching characteristics of ethyl red doped polymer film

2008 ◽  
Vol 30 (9) ◽  
pp. 1349-1354 ◽  
Author(s):  
Tang Xu ◽  
Guiying Chen ◽  
Chunping Zhang ◽  
Zhaofeng Hao ◽  
Xuxu Xu ◽  
...  
Keyword(s):  
Polymer Film ◽  
Optical Switching ◽  
All Optical ◽  
Switching Characteristics ◽  
Doped Polymer ◽  
All Optical Switching
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