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An intricate relationship between the intensity of surface-enhanced Raman scattering (SERS) and the optical extinction are revealed. The observed unusual trend of SERS intensity decrease with the increase of extinction is explained analytically and numerically.
We investigated hot phonons based on Stokes Raman scattering from a GaN/AlN high electron mobility transistor. Such a simple method is advantageous compared with the method based on Stokes and anti-Stokes Raman scattering.
Laser cooling of solids based on anti-Stokes photoluminescence was proposed in 1929 [1]. Indeed, through the light emission based on phonon-assisted anti-Stokes photoluminescence, the average photon energy emitted is larger than that for the absorbed pump photons. The difference between the emitted and absorbed photon energies is made up by the energy of each removed phonon. Since phonons represent...
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