All Questions
14
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Refractive index from absorbance, transmittance or reflectance spectra of thin film, knowing its thickness [duplicate]
I have absorbance (Abs), reflectance (R%) and transmittance (T%) data of TiO2 deposited thin film on FTO glass substrate. The data was collected using UV-Vis spectrophotometer. Also, I know the ...
- 11
1
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1
answer
147
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Refractive index of titanium dioxide films as a function of wavelength for 400 C ° annealed films
I used UV-Vis/NIR spectrophotometer to extract the measurements of refractive index %R corresponding with wavelengths in the range of 190-1100 nm of TiO2 thin film deposited on FTO glass substrate. ...
- 11
1
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0
answers
134
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Refractive index dispersion relation of stainless steel
I am lookin for the refractive index dispersion relation of stainless steel.
I tried to search for it at https://refractiveindex.info/ and on google but I couldn't find anything.
I mainly need the ...
2
votes
0
answers
149
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What can be the possible causes for variation in stress-induced birefringence in an isotropic material?
Birefringence is the phenomenon of a material having a refractive index that depends on the polarization and propagation direction of light. When an unpolarized light passes through such a material, ...
- 21
3
votes
5
answers
491
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Variations in Refractive Index of Materials
It's quite a common fact that different types of glass have different refractive indices. Most sites I've found attribute these differences to variations in the 'density' of the glass, which is not ...
- 1,538
0
votes
2
answers
915
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Which naturally occuring solid material has the lowest refractive index?
I am looking for the material with the lowest possible refractive index. Googling did not help much, the best I found is this article suggesting that n can be as low as 1.39, but not giving any ...
- 310
1
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1
answer
142
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Are there optical materials with larger mean deviation with little to zero angular dispersion?
The following statement is from Concepts of Physics by Dr. H.C.Verma, from the chapter "Dispersion and Spectra", page 434, topic "Dispersive Power":
The mean deviation depends on ...
- 5,306
3
votes
1
answer
536
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Why certain objects reflect while some refract?
Both reflection and refraction are processes where absorption and re-emission of electromagnetic waves occur, but they differ in the direction of re-emission. What factor particularly decides the ...
user197535
3
votes
3
answers
1k
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Titanium Dioxide refractive index
Titanium dioxide has high refractive index and it is one of the whitest materials.
Does refractive index help in giving $\rm TiO_2$ white color? I know it appears white because it scatters all the ...
- 151
1
vote
2
answers
1k
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What does the refractive index for e.g. alpha mean?
When I look for some materials like https://en.wikipedia.org/wiki/Barium_sulfate and want to extract the refractive index then there is written: (nD)=1.636 (alpha). And sometimes also for beta and ...
- 1,507
4
votes
4
answers
10k
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What is the connection between the refractive index of a material and its transparency?
From my understanding, refractive index is an indication as to how the speed of light changes when it passes through a material. However a professor has asked me how would I determine whether or not ...
- 133
1
vote
1
answer
139
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What are the physical optical limitations photonic metamaterials can offer?
Modern technology has introduced new photonic metamaterials that can extend optical properties beyond what standard materials can offer. For example a negative index of refraction is now possible ...
- 11.7k
7
votes
2
answers
3k
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Why Negative refractive index is negative
$n=\sqrt{\epsilon \mu }$
Negative refractive index happens when permittivity ($\epsilon $) and permeability ($\mu $)of a material is negative. My question is, if permittivity and permeabilitity of a ...
- 1,037
15
votes
3
answers
2k
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Can the speed of light become complex inside a metamaterial?
The speed of light in a material is defined as $c = \frac{1}{\sqrt{\epsilon \mu}}$. There are metamaterials with negative permittivity $\epsilon < 0$ and permeability $\mu < 0$ at the same time. ...
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