All Questions
Tagged with optics electromagnetism
596
questions
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How to use dipoles to enforce the boundary conditions for a spherical dielectric with complex permittivity
I want to impose an electric and magnetic field on a spherical dielectric of radius $ R $ and relative permittivity $\epsilon_r=\epsilon'+i\epsilon''$. Say the fields are slowly-varying (like a plane ...
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2
answers
123
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Diffraction when the wavefront is not parallel to the plane
I am studying Feynman's chapter on the origin of the index of the refractive index (see this link).
If I am not mistaken, what he does is to prove that when a wave enters a medium (modelled as a ...
0
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1
answer
31
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What is the relation between the Faraday effect and the Zeeman effect?
The Faraday Effect basically says that certain materials under a magnetic field have different indexes of refraction for right and circular polarized light. Linear light which is a superposition of ...
2
votes
2
answers
78
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Is magneto-optic Kerr effect discernible for material with natural optical activity?
Magneto-optic Kerr effect requires a system with internal magnetism or external magnetic field and exhibits, say, circular dichroism for reflection measurements. Natural optical activity can have ...
1
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1
answer
55
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Permittivity real and imaginary parts with similar value possible?
Here's the context; I'm studying biological tissues that are supposed to behave like dielectrics. Using the modified cole-cole equation for theoretical predictions:
$$\tilde{\varepsilon}_r (\omega )= \...
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1
answer
47
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Most generic form of refractive index tensors
The refractive index of a material is in general a $3x3$ tensor (as in the case of birefringent crystals). From literature, it seems that in the case of transparent crystals, this tensor is in general ...
1
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1
answer
52
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Confusion regarding phase
As far as I know about phase if the phase difference between two waves is positive, the former is leading..and the latter is lagging. Then why has D J Grifith stated this?
If the phase of the magnetic ...
4
votes
1
answer
183
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Amplitude of single-mode field in a cavity
I have two contradictory result about the amplitude of single mode field when it is quantized
In C. Gerry and P. Knight's Introductory quantum optics, the amplitude is given by
$$\sqrt{\frac{2\omega^...
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1
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745
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What is the physical meaning of the complex field amplitude?
I see that the harmonic field is sometimes written in exponential form. But sometimes the complex amplitude of this form is just a constant and in others (like when talking about modes) is dependent ...
2
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2
answers
45
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How should I calculate the TE and TM modes on an anisotropic/uniaxial slab waveguide?
I want to find the equations governing the TE and TM modes on the following three-layered slab waveguide:
I know how to use the Helmholtz equation and solve for the boundary conditions on normal ...
0
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1
answer
33
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Light acceleration method using inhomogeneous material mediia
Some time ago I posted this question but I reckon it was too vague. Nontheless, I've been working on it and I've come up with some interesting conclusions. My question is: can light be subject to an ...
0
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1
answer
162
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Intensity and complex electric field
I have come across an issue with the use of complex electric and magnetic fields that I just cannot quite figure out. I will lay out my thought-process and I would like to know if and why it is wrong.
...
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22
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Surface plasmon polariton filling the gaps
Why does the angle of incidence on a DPS(positive electric permeabillity and magnetic susceptibillity)material and a SNG(1 of $\epsilon$ and $\mu$ positive)material have to be close to 90 degrees to ...
1
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1
answer
44
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Are temporal coherence (for classical EM waves) and quantum coherence related concepts?
For my wave optics class, I was taught that the temporal coherence of a light source is the average time interval for which the phase of that light is predictable, after which the source will undergo ...
1
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0
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25
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Meaning of negative frequency in nonlinear susceptibility?
When I am learning the nonlinear optics, for cases like difference frequency generation and optical rectification, the second order susceptibility tensor can take the form $\chi(0;\omega,-\omega)$. ...