All Questions
Tagged with optics electromagnetism
595
questions
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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 )= \...
- 189
0
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1
answer
44
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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 ...
- 141
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49
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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 ...
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
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32
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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 ...
- 1,629
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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
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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 ...
0
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1
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156
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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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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 $\chi(0;\omega,-\omega)$. ...
2
votes
2
answers
55
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Why is a monochromatic wave temporally coherent for all time delays $\tau$?
I've been learning about coherence of waves and the Wikipedia page on says a monochromatic electromagnetic plane wave is coherent because:
A wave containing only a single frequency (monochromatic) is ...
- 531
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1
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78
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Inconvenience of speed of light in optic fiber
As far as I'm concerned, optic fiber is great in order to transport information quickly using light. Since light needs to undergo total internal reflection every single time it hits the walls of the ...
- 1,629
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2
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53
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Amplitude of light in double slit experiment
While reading about double slit experiment I have found no article where the amplitudes of light at the board ( on which light falls) is calculated . Only the fringe width and intensity ratios are ...
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26
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How can Fresnel's transmission coefficient be nonzero in Total Internal Reflection?
I'm working on a problem in which a wave is moving through a transparent medium of refractive constant $n_i$. It then reaches the interface of said medium with another one of refractive constant $n_t&...
- 1,629
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58
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Why the dielectric permitivity matrix of lossless media is symmetric?
I am studying optics and I met a strange statement in the section 2.3.4 (page 34) of Fundamentals of Nonlinear Optics by Peter E. Powers and Joseph W. Haus.
The relationship between $\vec{D},\ \vec{E}$...
- 388
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54
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Ambiguities in optical waveguide modes
While studying concept of slab waveguide mode, I got stuck on some problems.
In textbook(Yariv chapter 3 pg 112), for guided TE modes it tells that the mode function
is taken as
which means that the ...
