All Questions
39
questions
0
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2
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63
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Which factors determines whether a photon is absorbed? [duplicate]
After some research, I figured out that all EM waves/photons are absorbed by atoms by exciting an electron from an orbital to an other. However, atoms emit only certain EM waves with specific ...
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156
votes
1
answer
15k
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What is an "attosecond pulse", and what can you use it for?
The 2023 Nobel Prize in Physics was announced today, and it was awarded to Pierre Agostini, Ferenc Krausz and Anne L’Huillier, for
“experimental methods that generate attosecond pulses of light for ...
- 134k
3
votes
2
answers
623
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Hong–Ou–Mandel effect
The Hong–Ou–Mandel effect is a two-photon interference effect in
quantum optics that was demonstrated in 1987 by three physicists from
the University of Rochester: Chung Ki Hong, Zheyu Ou, and Leonard
...
- 613
2
votes
0
answers
81
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How does photon reflection work quantum mechanically? [duplicate]
When a single photon strikes a mirror, it is reflected back such that the incident angle= the reflected angle. When the photon interacts with the surface lattice of the mirror, what exactly is ...
- 719
0
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2
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84
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This setup works for polarization. Does it work for wavelength?
In the school I was impressed with the following experiment: there are two polarization filters with orthogonal polarization directions placed at a distance from each other. They do not allow any ...
- 11.2k
2
votes
1
answer
572
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What's the physical origin of bound states in the continuum (BICs)?
From my point of view, BICs are modes built by destructive interference. But I'm confused about the orgin of BIC, I have two questions:
The differences between BIC modes and defect modes.
It has ...
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4
votes
4
answers
212
views
What are the microscopic details of diffraction?
In a recent question I asked how double-slit diffraction conserves momentum and the answer was that each photon gets a "kick" from the slits. So my question now is, what does that look like ...
- 1,145
1
vote
2
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346
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Can Electron waves undergo Polarisation just like Light?
Here electron waves refers to the matter wave of electrons as proposed by De-Broglie hypothesis.
0
votes
1
answer
170
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Elliptical Polarization
How can we say that the states $$|\psi _1\rangle = \frac{1}{\sqrt{3}}(-|h\rangle + \sqrt{2}\, e^{-i2\pi/3}|v\rangle),$$
$$|\psi _2\rangle = \frac{1}{\sqrt{3}}(-|h\rangle + \sqrt{2}\, e^{i2\pi/3}|v\...
0
votes
0
answers
56
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Are there any videos of diffraction grading experiments one photon at a time?
I have seen the video of a double slit one photon at a time but wondering if there is a video of a Diffraction grading experiment one photon at a time.
- 4,083
-1
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2
answers
252
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How does a photon know what to do when It interacts with the first surface of a LIGO mirror?
There are 72 alternating boundaries (optical coatings) to traverse before it can decide whether to reflect or pass through the mirror. The boundary properties are such that the the first boundary by ...
- 304
11
votes
4
answers
3k
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If a polarized light wave is indistinguishable from its original self after being flipped 180°, why doesn't a photon have a spin of two?
The spin of a photon has a counterpart in classical physics, it's polarization, right?
And if you spin a polarized light wave by 180°, (or pi radians), it is now the same as before, correct?
So why ...
- 4,509
0
votes
1
answer
83
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Using flat or thin glass for Surface Plasmon Resonance
SPR is typically created using prism with a thin gold film on the other end. I was wondering if I cut the triangular prism (using a glass cutter at home) into thinner slices, would this have an impact ...
- 101
-2
votes
1
answer
206
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Can you see a photon from the side?
I'm trying to understand the shape and size of individual quantum particles.
According to the book Tales of the Quantum the quantum wave of a photon in the visible range is a few centimetres wide. The ...
- 4,783
3
votes
0
answers
220
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Kirchhoff's law for glass and transparent crystals; how exactly do hot transparent materials produce so much visible thermal radiation?
Together, the current answers to Is the visible light spectrum from "red-hot glass" at least close to Blackbody Radiation? explain that while we can not necessarily call a heated sample of ...
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