Selection of numerical differentiation method for calculation of group refractive index of air over all calculable wavelengths

Optik ◽  
2017 ◽  
Vol 130 ◽  
pp. 1362-1369 ◽  
Author(s):  
Dong Wei ◽  
Muzheng Xiao ◽  
Ping Yang
Keyword(s):  
Refractive Index ◽  
Numerical Differentiation ◽  
Differentiation Method ◽  
Group Refractive Index ◽  
Selection Of

Application of the turbidity ratio method in the spherical particle size determination in the range m ∈ and α ∈

1979 ◽  
Vol 44 (7) ◽  
pp. 2064-2078 ◽  
Author(s):  
Blahoslav Sedláček ◽  
Břetislav Verner ◽  
Miroslav Bárta ◽  
Karel Zimmermann
Keyword(s):  
Refractive Index ◽  
Spherical Particle ◽  
Ratio Method ◽  
Refractive Indices ◽  
Relative Refractive Index ◽  
Particle Size Determination ◽  
The Individual ◽  
The Given ◽  
Turbidity Ratio ◽  
Selection Of

Basic scattering functions were used in a novel calculation of the turbidity ratios for particles having the relative refractive index m = 1.001, 1.005 (0.005) 1.315 and the size α = 0.05 (0.05) 6.00 (0.10) 15.00 (0.50) 70.00 (1.00) 100, where α = πL/λ, L is the diameter of the spherical particle, λ = Λ/μ1 is the wavelength of light in a medium with the refractive index μ1 and Λ is the wavelength of light in vacuo. The data are tabulated for the wavelength λ = 546.1/μw = 409.357 nm, where μw is the refractive index of water. A procedure has been suggested how to extend the applicability of Tables to various refractive indices of the medium and to various turbidity ratios τa/τb obtained with the individual pairs of wavelengths λa and λb. The selection of these pairs is bound to the sequence condition λa = λ0χa and λb = λ0χb, in which b-a = δ = 1, 2, 3; a = -2, -1, 0, 1, 2, ..., b = a + δ = -1, 0, 1, 2, ...; λ0 = λa=0 = 326.675 nm; χ = 546.1 : 435.8 = 1.2531 is the quotient of the given sequence.

Case studies of choosing a numerical differentiation method under uncertainty

1996 ◽  
Vol 31 (3) ◽  
pp. 9-26
Author(s):  
Andrei M. Finkelstein ◽  
Misha Koshelev
Keyword(s):  
Case Studies ◽  
Numerical Differentiation ◽  
Differentiation Method

A numerical differentiation method and its application to reconstruction of discontinuity

2002 ◽  
Vol 18 (6) ◽  
pp. 1461-1476 ◽  
Author(s):  
Y B Wang ◽  
X Z Jia ◽  
J Cheng
Keyword(s):  
Numerical Differentiation ◽  
Differentiation Method

Minimal group refractive index dispersion and gain evolution in ultra-broad-band quantum cascade lasers

2002 ◽  
Vol 14 (12) ◽  
pp. 1671-1673 ◽  
Author(s):  
C. Gmachl ◽  
A. Soibel ◽  
R. Colombelli ◽  
D.L. Sivco ◽  
F. Capasso ◽  
...  
Keyword(s):  
Refractive Index ◽  
Quantum Cascade Lasers ◽  
Broad Band ◽  
Refractive Index Dispersion ◽  
Minimal Group ◽  
Quantum Cascade ◽  
Group Refractive Index ◽  
Cascade Lasers

scholarly journals Optimization of Nonspherical Gold Nanoparticles for Photothermal Therapy

2019 ◽  
Vol 9 (20) ◽  
pp. 4300
Author(s):  
Paerhatijiang Tuersun ◽  
Xiayiding Yakupu ◽  
Xiang’e Han ◽  
Yingzeng Yin
Keyword(s):  
Gold Nanoparticles ◽  
Refractive Index ◽  
Photothermal Therapy ◽  
Therapeutic Agents ◽  
Tissue Type ◽  
Excitation Wavelength ◽  
Objective Functions ◽  
Design Tolerance ◽  
T Matrix ◽  
Selection Of

Previous investigations devoted to the optimization of nonspherical gold nanoparticles for photothermal therapy (PTT) encountered two issues, namely, the appropriate selection of objective functions and the processing of particle random orientations. In this study, these issues were resolved, and accurate optimization results were obtained for the three typical nonspherical gold nanoparticles (nanospheroid, nanocylinder, and nanorod) by using the T-matrix method. The dependence of the optimization results on the excitation wavelength and the refractive index of tissue was investigated. Regardless of the excitation wavelength and tissue type, gold nanospheroids were found to be the most effective therapeutic agents for PTT. The light absorption ability of optimized nanoparticles could be enhanced by using a laser with a longer wavelength. Finally, the design tolerance for the different sizes of nanoparticles was provided.

scholarly journals Group refractive index reconstruction with broadband interferometric confocal microscopy

2008 ◽  
Vol 25 (5) ◽  
pp. 1156 ◽  
Author(s):  
Daniel L. Marks ◽  
Simon C. Schlachter ◽  
Adam M. Zysk ◽  
Stephen A. Boppart
Keyword(s):  
Refractive Index ◽  
Confocal Microscopy ◽  
Group Refractive Index

scholarly journals Sensing Features of Arc-induced Long Period Gratings

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 29
Author(s):  
Esposito ◽  
Srivastava ◽  
Campopiano ◽  
Iadicicco
Keyword(s):  
Refractive Index ◽  
Systematic Investigation ◽  
Proper Selection ◽  
Long Period ◽  
Long Period Gratings ◽  
Surrounding Refractive Index ◽  
Fabrication Parameters ◽  
Selection Of

In this work, we report a systematic investigation about the sensitivity of arc-induced Long Period Gratings in standard SMF28 fiber. Several gratings were fabricated with period Λ in range 330–630 µm and characterized towards changes in the surrounding refractive index (SRI), temperature and strain conditions. Wide tuning of the sensitivities is reported, with maximum values of -6391.7 nm/RIU, 95.5 pm/°C and 2.0 pm/με, respectively, for SRI, temperature and strain. These results permit the proper selection of the fabrication parameters in order to have the desired sensing features for a specific application.

The Group Refractive Index of Air

1968 ◽  
Vol 7 (7) ◽  
pp. 1408 ◽  
Author(s):  
L. E. Wood ◽  
M. C. Thompson
Keyword(s):  
Refractive Index ◽  
Group Refractive Index
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