Questions tagged [photonics]
Photonics is the science of creating, moving, and detecting photons
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What is the relationship between directions in reciprocal and real space of a photonic crystal?
I am reading "Photonic crystals - molding the flow of light" by Joannopoulos et al. (available on-line). The figures below are reproduced from there.
This is a diagram of a triangular lattice of air ...
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Choice of Unit Cell on Band Diagram (Brillouin Zone Folding)
I am looking at photonic band diagrams specifically, but my question relates to band diagrams in general.
For a honeycomb lattice, I can pick a (primitive) rhombic unit cell or a hexagonal unit cell. ...
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Distorsion in Photoluminescence
I am studying photoluminescence, but I do not understand why during measurement it turns out that the signal is distorted due to appearance of a long-wavelength replica of the fundamental laser ...
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Why does first photonic band go to zero at the centre of the Brillouin zone?
I have been plotting photonic band diagrams of various geometries recently and I identify if it is correct by looking if it goes to zero at the Brillouin zone centre, $\Gamma$. I realised early on ...
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What is the irreducible Brillouin zone for a rhombic unit cell?
So I realised that the rhombic unit cell is in fact not the same as a hexagonal unit cell. (I thought they both gave hexagonal lattices but the rhomic unit cell with two rods gives a honeycomb lattice ...
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Frequency Chirp, Instantaneous Frequency and Photons
I understand ideas coming from Optics, such as the concept of frequency chirp and instantaneous frequency, and their use in nonlinear optics. However, I am struggling in giving them an intuitive ...
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Why doesn’t simultaneous wave particle observation collapse the wave function?
My question is pretty much as the subject suggests. Recently Fabrizio Carbonne and a team from EPFL have managed to image the wave particle duality of light. I thought however that this was a ...
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How to amplify a light source while preserving its wavelength?
If I have a monochromatic light source of wavelength λ, that is quite feeble, say 1nW, is there an equipment that will let me amplify this signal with an output at precisely the same wavelength?
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What is a leaky mode of a waveguide?
I know that in a waveguide is possible to distinguish between guided modes and radiative modes.
For example, in a planar waveguide, a guided mode is oscillatory inside the core and vanishes ...
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Why exciton-plasmon electromagnetic coupling is possible?
There is a number of works about exciton-plasmon hybrid excitations (polaritons) in nanostructures, for example:
https://aip.scitation.org/doi/abs/10.1063/1.4895061?journalCode=jap
https://www....
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Propagation of a flat-top laser beam in free space
I have spent some time looking at how to design a field mapping system that turns a Gaussian beam profile into a top-hat beam. However, it would also be very useful to have a very sharp super-Gaussian ...
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Good book on quantum photonics and applications
I am just looking for an easy to read introduction to quantum photonics and possible applications. Terms like "Fock state" and "Photon (anti)bunching" should be understood after reading. Perhaps also ...
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Learning material on optical computing
I'm looking for guidance to choose material for a self-study of photonics, biased towards optical computing recent advances.
My background is of undergraduate level electrodynamics, quantum mechanics,...
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What is up and down conversion in photonics?
I have heard the terms up and down conversion in photonics/photovoltaics articles. What do the terms mean?
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