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A sum-frequency system with a "hot" mirror could act something like an optical switch: Unlike a switch, the output frequency will be different from either of the inputs.

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Let express the equations of motion and the Euler-Lagrange equations with zero right hand sides $$\bbox[#FFFF88,12px]{\ddot{Q}_{k}+\omega^{2}_{k}Q_{k}-2\dfrac{\dot{q}}{q}\sum_{j}g_{kj}\dot{Q}_{j}-\dfrac{\ddot{q}q-\dot{q}^{2}}{q^{2}}\sum_{j}g_{kj}Q_{j}-\dfrac{\dot{q}^{2}}{q^{2}}\sum_{j\ell}g_{jk}g_{j\ell}Q_{\ell}=0} \tag{01a}$$ ...

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Laser Mirrors are used for beam-steering in demanding laser applications. Laser Mirrors are Optical Mirrors that have been designed for specific laser types or wavelengths.Optics’ Laser Mirrors feature dielectric coatings that have been optimized for high reflectance at specific laser wavelengths. Edmund Optics’ dielectric coatings typically feature greater ...

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Correlation functions (in your case auto-correlation function) means the following: You take an initial field $e(t)$ in your case at a single point in space $x$. As a result of the surrounding medium (polarization etc.) of its vicinity, after a time $\tau$, it will be $e(t+\tau)$. $e(t+\tau)$ is of course related to $e(t)$ via the time evolution of the ...

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This situation would lead to an accumulation of the photons inside this sphere. Quantum mechanics has no prohibitions for bosons, like photons, to occupy the same space under the same quantum numbers, so the photons would just build up continuously. But at no moment any of them should create other particles, since this would require interactions if charges ...

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This is a typical matrix for an optically active element that rotates the light polarisation. A cuvette of water with sugar will do the job. Proportional to the sugar concentration, you can obtain arbitrary wave rotation. Note that the U matrix has imaginary eigenvectors (1+i)/sqrt(2) and (1-i)/sqrt(2). Accordingly, unlike λ/4 plates, the eigenwaves of such ...

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Let's just say that given a sufficient density of photons, you would expect things like pair production to occur with some probability. However, these massive particles will occur as particle-antiparticle pairs, thus won't "accumulate" since they'll annihilate each other if there are too many of them. They might also annihilate with your mirrored sphere. As ...

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Just like an electron, light can have spin angular momentum and orbital angular momentum. To make a beam of light with orbital angular momentum you can make a diffraction pattern where instead of a series of parallel lines you have one line that forks where the one line comes in and two (or more) lines come out. Then if you shin the right kind of light beam ...

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Possibly in the slightly negative energy region of a Casimir mirror pair However, the effect is really small

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There may be scope in this question to mention the faster than light (FTL) capabilities of Tachyons (should they exist). If (in the language of Speacial Relativity) we apply the first postulate of SR to tachyons and there is an instantaneous transmission of information in one inertial frame then it would be true to say this occurs in all inertial frames. I ...

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