• ### Real part of refractive index Physics AsktoWorld

3 Answers 3 The real part of the complex refractive index is the normal refractive index and is related to the part of wave that transmits through the medium Let s see what the imaginary part of the refractive index would do to a wave of the form A e i o t a k x The refractive index is part of k in the medium so that being imaginary will

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• ### How to find the imaginary part of effective mode index

Hi I tried our example model step index fiber bend and you should get the effective mode index at radius r0 with the expression ewfd2 neff/r0 This evaluates to about 1 4435 2 052e 6i so the imaginary part is pretty small and by default COMSOL is only displaying the real part

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• ### Mathematical description of EM waves

The complex refractive indexScattering = real partAbsorption = imaginary part Absorption and skin depthBeer s Law Mathematical description of EM waves What is a wave A wave is anything that moves To displace any function f x to the right just change its argument from x to x a where a is a positive number

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• ### opticsReal part of refractive indexPhysics Stack

The refractive index is part of k in the medium so that being imaginary will make the wave decay exponentially You have your answer there the imaginary part of the refractive index is related to the part of the wave that gets absorbed in the medium Share Improve this answer

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• ### Determination of the complex refractive index of highly

4 1 Imaginary Part of the Refractive Index The imaginary part of the refractive index characterized by the absorption constant k is proportional to the absorption coefficient The absorption coefficients determined in the present study are in agreement with most of the values found in the literature

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• ### Snell s Law and complex refractive indices Math Help Boards

This can be conveniently taken into account by defining a complex index of refraction Here the real part of the refractive index indicates the phase speed while the imaginary part indicates the amount of absorption loss when the electromagnetic wave propagates through the material

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• ### Measurements of the complex refractive index of volcanic

The imaginary part of the refractive index was measured for a sample of 30 particles within each of the 11 ash specimens By volume averaging over the particles within each sample an effective imaginary part of the refractive index was calculated The overall values are displayed in Figure 4b

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• ### Spectral absorption coefﬁcients and imaginary parts of

imaginary part of the refractive index The analysis of spectral refractive indices in a large spectral range is a powerful tool for estimating chemical compositions and thus the sources of aerosols To close this gap and deriving spectral absorption co efﬁcients a

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• ### Complex Refractive Index Tomoya Kawaguchi Ph D

label Eq refractive index tag 1 end align where K and k are the wave numbers in the vacuum and the material respectively n is the real part of the refractive index and delta corresponds to the its discrepancy from 1 and beta is the imaginary part of the refractive index Note that the sign in the imaginary part

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• ### FreeSnell Refractive Index Spectra

Program to maintain refractive index database FreeSnell is a program to compute optical properties of multilayer thin film coatings Spectral data may be given in terms of wavelength photon energy frequency or wavenumber The real part of each spectral refractive index value is n the imaginary part extinction coefficient is k Parametric Data

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• ### Refractive index of SiO2 Silicon dioxide Silica Quartz

2 C Z Tan Determination of refractive index of silica glass for infrared wavelengths by IR spectroscopy J Non Cryst Solids 223 1998 Sellmeier formula is reported in Ref 1 for the 0 21 3 71 μm wavelength range Ref 2 verifies the validity of the formula up to 6 7 μm

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• ### Sand DataUniversity of Waterloo

Extinction coefficient refractive index imaginary part of magnetite nm interpolated from original data with a resolution of 1nm download matlab file Original data source A Schlegel S F Alvarado and P Wachter Optical properties of magnetite Fe 3 O 4 Journal of Physics C Solid State Physics 12 1979

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• ### RP Photonics Encyclopediaeffective refractive index

In that case the imaginary part is related to gain or losssee the article on refractive index for more details

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• ### Spectral absorption coefficients and imaginary parts of

The imaginary part of the refractive index k of hematite was only calculated from 590 to 790 nm because the RI inversion method failed for high values of k which is the case for smaller wavelengths Both measured spectra show a minimum of the imaginary part and the absorption coefficient at the wavelength of 750 nm

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• ### Refinement of the imaginary part of the complex refractive

Refinement of the imaginary part of the complex refractive index of liquid aluminum oxide L P Bakhir G I Levashenko V V Tamanovich Journal of Applied Spectroscopy volume 26 pages 378–383 1977 Cite this article

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• ### RF module refractive indexCOMSOL

1 When I want to add Aluminum to the ONAT sample in Material Contents box > Refractive Index row the values of Refractive Index and Refractive Index imaginary part is undetermined and I must fill it with a number But we know the refractive index of Aluminum is different for different wavelengths

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• ### Refractive Index of Graphite and Graphene at

determine the imaginary part of the refractive index of graphite and graphene at wavelengths spanning the carbon K edge The real part of the refractive index has been derived from this measured imaginary part via piecewise polynomial Kramers Kronig transformations This

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• ### Refractive index of SiO2 Silicon dioxide Silica Quartz

1 I H Malitson Interspecimen comparison of the refractive index of fused silica J Opt Soc Am 55 1965 2 C Z Tan Determination of refractive index of silica glass for infrared wavelengths by IR spectroscopy J Non Cryst Solids 223 1998

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• ### Empirical modelling to predict the refractive index of

The imaginary part of the refractive index can be understood using the Bouguer Lambert law The attenuation of light passing through the medium is linearly related to the distance the light travels through the medium x and the concentration of the absorber C by the given

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• ### Refractive Index and Absorption Attribution of Highly

Imaginary refractive index for BC at 405 532 and 781 is taken as 0 73 0 72 and 0 75 respectively 13 The refractive index of inorganics is taken as 1 55 ± 0 0i 1 BrC Refractive Index

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• ### Relationship between the refractive index and absorption

The intensity dependent component of the refractive index is known as the Kerr nonlinearity real part and saturable absorption imaginary part

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• ### Title Calculations of the refractive index of AlGaN/GaN

contributions to the imaginary part the real part of dielectric function e1 E is obtained by Kramers Kronig transformation KKT When the real and imaginary parts of the dielectric function are known calculation of the refractive index is straightforward

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• ### A new method for measuring the imaginary part of

Atmospheric refractive index consists of both the real and the imaginary parts The in tensity of refractive index ﬂuctuation is usually expressed as the refractive index struc ture parameter whose real part reﬂects the strength of the atmospheric turbulence 5 while the imaginary part reﬂects the absorption in the light path The large aperture

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• ### Measurements of the complex refractive index of volcanic

A novel method is introduced to derive the imaginary part of the refractive index from the attenuation of light by ash The method has a precision in the range 10 −3 –10 −4

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• ### Determining the Complex Refractive Index of Materials in

Both MG continuous line and Bruggeman dashed line models well fit the experimental data open circles because scattering effects do not affect so much the time of flight of the THz beam across the sample i e the real refractive index n On the other hand the imaginary part of the permittivity Figure 13 right cannot be fitted by a

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• ### DETERMINATION OF THE REFRACTIVE INDEX OF

medium real part and the absorption or reflectance of the material imaginary part 3 where k is the extinction coefficient also called index of absorption As a result the refractive index may be considered an intrinsic property of a material which is expressed as the result both of the interaction phenomena of

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• ### opticsImaginary number for extinction coefficient in

Imaginary number for extinction coefficient in complex refractive index In complex refractive index on a material n = n ′ i k the imaginary part k is physical meaning as it shows absorption in the material but it is an imaginary

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• ### COMPLEX REFRACTIVE INDEX AND LIGHT ABSORPTION

COMPLEX REFRACTIVE INDEX OF InP An InP crystal has a refractive index real part n of 3 549 at a wavelength of 620 nm photon energy of 2 eV The reflectance of the air InP crys­tal surface at this wavelength is 0 317 Calculate the extinction coefficient K and the absorption coefficient a of InP at this wavelength

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• ### Handout 06 Dielectric Constant and Refractive Index of

Imaginary Part of the Refractive Index and the Loss Coefficient We have already seen that stimulated absorption results in a wave to decay in a medium optical loss P R R FBZ 3 3 2 2 2 ˆ 2 f k f k E k E k d k P n m n c q cv v c c v o q r E r e ˆ 2 Where But we also have q r c n E r e ˆ This means the imaginary part of the

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• ### COMPLEX REFRACTIVE INDEX AND LIGHT ABSORPTION

The complex refractive index N with real part n and imaginary part K is defined as the ratio of the complex propagation constant in a medium to propagation constant in free space N = n jK = = j j

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• ### Handout 06 Dielectric Constant and Refractive Index of

Imaginary Part of the Refractive Index and the Loss Coefficient We have already seen that stimulated absorption results in a wave to decay in a medium optical loss P R R FBZ 3 3 2 2 2 ˆ 2 f k f k E k E k d k P n m n c q cv v c c v o q r E r e ˆ 2 Where But we also have q r c n E r e ˆ This means the imaginary part of the

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• ### Refractive indexphiliplaven

The refractive index of any substance is best described as a complex number such as 1 34 i 0 00067 The real part of this number is the ordinary refractive index as discussed above whilst the imaginary part indicates the amount of absorption If the imaginary part

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