All Questions
Tagged with optics condensed-matter
53
questions
1
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1
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55
views
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
1
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2
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148
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How does the diffraction pattern of a 2-dimensional grating/lattice relate to the reciprocal lattice?
I am trying to understand the relationship between the diffraction pattern produced when shining light onto a 2D lattice and the reciprocal lattice of the direct lattice in question.
So suppose we ...
- 1,581
0
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0
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42
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Microscopic origin of magneto-optical phenomena in non-magnetic materials?
As I understand it indium antimonide (InSb) is a non-reciprocal optical material. Having non-diagonal (non-reciprocal) components in its dielectric susceptibility tensor, in the presence of a magnetic ...
- 5,568
0
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0
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28
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Optical properties of non-Newtonian fluids
I'm interested in understanding the distinctions between non-Newtonian fluids and regular Newtonian fluids regarding their optical properties, including refractive index, nonlinear optical behavior (...
- 342
3
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0
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87
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Numerical procedure for finding steady eigenstate for a non-Hermitian effective model
I am working with an effective model describing an exciton-polariton system. I need to solve the Schrödinger equation (eigenvalue problem). To describe the presence of losses the diagonal terms are ...
- 31
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2
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90
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What is Helicity in High Harmonic Generation?
The harmonic spectra are calculated as $|FT(\frac{d}{dt}\mathcal{J}(t))|^2$, where $FT$ si the Fourier Transform and $\mathcal{J}(t)$ is the current. We need to identify which multiple of incident ...
1
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0
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37
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Plasmon and The Orientation of the Plasma Oscillation
The electric field wave resulting from plasma oscillation can be broken down into the transverse and longitudinal components, whose frequencies are given by
$$\omega_{transversal} = \sqrt{c^2k^2+\...
- 692
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1
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81
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Is there such a thing as a bare polariton?
When dealing with photons in matter, I have seen it treated in many ways depending on the material, this leads to exciton polaritons (when dealing with electrons and holes), plasmaritons (dealing with ...
- 5,568
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0
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29
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How to prove that a two-photon transition amplitude is absent in a crystal that obeys inversion symmetry?
In crystals that obey inversion symmetry retain their polarization form in $x\to -x$, we can prove that even order susceptibilities get canceled. But I want to know if there exists any way that I can ...
2
votes
2
answers
108
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Interference or diffraction? [duplicate]
Suppose I have $N$ slits separated by a distance $a$. We are sending a light source of wavelength comparable to the slit width. Then which of the effect should dominate: Interference or diffraction?
...
- 1,348
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1
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125
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Can an observer visible distinguish between Rayleigh and Mie scattering of monochromatic light by a medium?
Is there a way to visually determine that monochromatic scattered light by a medium is Rayleigh or Mie scattered by this medium?
And if there is no way to tell the difference by just looking at it, ...
- 4,170
3
votes
2
answers
440
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In general which laser would cut clear glass more easily, a visible spectrum laser or an infrared laser?
Assuming the two lasers have identical characteristics and power output except their wavelength, which one would be more successful and easy in cutting clear glass?
In case there is doubt that you can ...
- 4,170
0
votes
1
answer
207
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What is the difference between MOKE hysteresis loop and VSM Hysteresis loop?
I need to understand what is the difference between Magneto-optical Kerr effect (MOKE) hysteresis loop and vibrating sample magnetometer (VSM) hysteresis loop? And the use of each one of them?
- 4,170
2
votes
3
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216
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Why only the wavelength and speed of refracted light traveling inside a transparent material changes and not its frequency? [duplicate]
When monochromatic light waves travel from one medium to another the frequency never changes.
A transition to a denser medium will result of a slow down of the propagation speed v of the light wave ...
- 4,170
3
votes
1
answer
37
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What is the diffraction limit of "atom lasers"
Due to De Broglie wavelength's behaving differently from photons, the theoretical limit, i.e: not limited by system imperfections, is not clear.
- 441