All Questions
9
questions
0
votes
1
answer
77
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Recreating Millikan's Photoelectric Experiment
I am designing a set-up to recreate Millikan’s Photoelectric Experiment, which is similar to all the standard online simulations. I hope to achieve this without using a vacuum as it is very expensive ...
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0
votes
1
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1k
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Combination of half wave plate, quarter wave plates and q-plate
I would like to understand half wave plate, quarter wave plates and q-plate. (A q-plate is an optical device which can generate light beams with orbital angular momentum of light (OAM)). Quarter-wave ...
- 1
0
votes
1
answer
210
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Relationship between extinction coefficient and the imaginary refraction index
I'm trying to add an ITO glass material made by SPI to an FDTD Lumerical simulation. For that I need the real and imaginary parts of the refractive index. In their website though, they give the real ...
- 113
0
votes
3
answers
126
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Regarding Michelson's interferometer
In Michelson's Interferometer (1881 experiment), even though the arm length for both the perpendicular arms was taken as the same (say $L$) and a compensatory plate was used to removed optical path ...
3
votes
1
answer
744
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Why is photocathode damaged by excessive photocurrent due to exposure to intense light?
Many books including the book (Hamamatsu, "Photomultiplier Tubes", link to PDF) says that a photocathode of a photomultiplier tube is damaged by intense light.
Do not expose to strong light....
- 175
1
vote
0
answers
73
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Conceptual explanation of Optical Tweezers
I have been trying to get my head around Optical Tweezers and why they work.
I understand it as that light rays holds the particle in place since if the particle moves, it changes the profile of the ...
- 467
0
votes
1
answer
6k
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What are Floquet modes?
When simulating a nanohole array for extraordinary optical transmission, I found that we have to use unit-cell boundary conditions. There is another concept to be understood which is Floquet modes. ...
- 39
2
votes
1
answer
1k
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What is zero-order transmission spectrum?
In the paper The extraordinary optical transmission through subwavelength hole arrays by T. W. Ebbesen it is shown at particular wavelength there is a peak observed in zero order transmission spectrum....
- 39
1
vote
0
answers
63
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How to isolate and verify the source of optical absorption/effects?
This is similar to my other question, but not the same -- that one was about the energy ranges of various absorption mechanisms, and this one is more about experimental techniques to find them.
Let's ...
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