All Questions
Tagged with refraction optical-materials
10
questions with no upvoted or accepted answers
7
votes
1
answer
482
views
What is the energy loss in total internal reflection?
In total internal reflection light inside a dense medium reflects from the boundary to a less dense medium. Since by Snell's law there is no allowed refracted ray, all energy continues along the ...
- 32.9k
4
votes
1
answer
251
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How does a broadband dielectric Mirror work?
It is widely known that dielectric mirrors work with several layers of at least two materials which differ in refractive index that are layered, such that partially reflected waves interfere ...
- 139
2
votes
2
answers
146
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What are some liquids with high ranges of refractive index with change in temperature?
I need to run an experiment on the effect of temperature on refractive index of a liquid, and in order to make the change most visible and have the lowest percent uncertainty I need the change in ...
- 21
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
1
vote
0
answers
349
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Change of refractive index using semiconductor
I was wondering, if it is possible to change the refractive index of a semiconductor using an electric field or current? I have heard about injecting charges to tune the refractive index. How/Why does ...
- 829
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 ...
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0
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0
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23
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What is meant by optical density?
I’m trying to research about optical density for a school task, but the definitions online are confusing me.
From what I’ve gotten, optical density is:
how much the intensity of light is increased or ...
0
votes
0
answers
46
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How can a greater than 1 reflectance coefficient be explained in $\rm SiC$-$\rm SiO_2$ interface?
I ran a simulation using the Transfer Matrix Method to plot the R,T and A curves for a SiC->SiO2 interface. There's a region of incident energies where the |r|^2 I get is higher than 1 and the ...
- 11
0
votes
0
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18
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Refraction and Snell's law at $\rm SiN$ inverse taper facet
For an optical inverse taper, for example, for a $\rm SiN$ taper, material of core is $\rm Si_3N_4$ while cladding is oxide. At the facet, there is a polish angle theta to reduce the backreflection. ...
- 1
0
votes
1
answer
279
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Highest refractive index dielectric
What is the material or metamaterial that is a very good dielectric and has a very high refractive index at least in frequencies below $500\ MHz$?
- 119