All Questions
36
questions
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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
1
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0
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56
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What's the difference between a rhombus lattice and a hexagonal lattice in photonics?
I am learning photonic crystal slabs. I try to figure out what the difference between a rhombus lattice and a hexagonal lattice in photonics is?
All I know is that they have diffefent Brillouin zones,...
- 11
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50
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How might one produce a glory -- a circular rainbow -- in crystal?
A glory is the technical name for a full circle rainbow, such as is sometimes (but rarely) seen from below above a waterfall, or below from above a cloud. I am asking this question here. because it ...
- 141
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42
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Optics experiment, rotating crystal, light always points down, is this possible?
Sorry for the loose title but the question is based on a bad memory. The story goes like this: Many years ago I took an electrodynamics course and as far as I remember the profesor brought a special ...
- 1
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2
answers
144
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What happens when we cut the crystal perpendicular to its optical axis?
In many optic experiments, it's always mentioned to cutting the crystal perpendicular to the optic axis, but why? cuz nothing change at all!
I'm going to add a picture for clarity:
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2
votes
1
answer
96
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Can polychromatic light be produced from monochromatic light after passing through a crystal in transmission spectroscopy?
I have an optical setup where monochromatic light (573.5nm) is passed through a cuprous oxide crystal (Cu2O). This light is then passed through a monochromator, but the output light is actually ...
- 21
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76
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Jone calculus in crystal optics and electro-optic sampling
Assume a linearly polarized light passing through a retardation crystal and a quarterwave plate and the angle between the linear light and the principal axis is 45 degrees. The question is to ...
- 111
2
votes
1
answer
105
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Refractive Index Ellipsoid for Circular Birefringence Materials
When light travels through an anisotropic medium, its refraction may depend on both its polarization and propagation. Such materials may be classified in terms of their (Linear) Birefringence as ...
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-1
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1
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140
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Refractive indices of liquid crystal
Refractive indices of liquid crystal • The birefringence is critical to the optical properties of the liquid crystal and underlies many of the applications of liquid crystals. • By reorienting the ...
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1
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0
answers
30
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Orientation of KDP crystal to generate 4th harmonic using a Nd:YAG Q-switched laser and set temperature to stabilize crystal
I am setting up a 4th harmonic generator for a Q-switched Nd:Yag laser that will already have the second harmonic generator in place. I need to know how to orient the KDP crystal with respect to the ...
- 11
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1
answer
762
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No solution to Bragg's law?
Bragg's Law provides a description for the diffraction peaks we observe when x-rays are incident on a crystal structure. We observe these diffraction peaks because the wavelength of the incident x-...
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1
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2
answers
60
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Is it possible to make invisibility cloak in real? [closed]
I am a materials science undergraduate student. I have a question out of curiosity if it is possible to make a material that can completely make things invisible? What are the problems we will ...
- 163
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votes
1
answer
65
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Why gain medium of a solid state laser are polished from sides facing mirrors and the rest is unpolished?
First of all aren't know if its the right place to ask this question or not.
I was wondering the reason behind this "setup" of polishing only the sides facing the resonator mirrors? And is ...
0
votes
1
answer
141
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Confusion about OPTIC axis of an crystal
Why it is essential to set a particular direction for an OPTICS axis of a crystal (e.g. Calcite)? What is the importance of that direction?
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1
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119
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Why only the phonon with $k=0$ contribute Raman intensity?
I have read some literature to know that Raman intensity corresponds to the inelastic scattering of light with ion vibrations, and the positions of Raman peak correspond to the energy of phonon.
My ...
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