Raman scattering of light by coherent polaritons

Transient Coherent Anti‐Stokes Raman Spectroscopy of Surface Polaritons

“…The formulas (3) to (5) give in principle the solution of the problem about the SP excitation with ultrashort pulses if in addition (for determination of the value cation of this result to the investigation of real features of the phenomenon is greatly difficult because the integration of the corresponding Fourier integrals in explicit form is impossible and their numerical integration is reduced to series which are convergent very slowly as is well known. Besides that the determination of UF' from the initial conditions is connected obviously with the solution of an integral equation, which additively complicates the problem.…”

Four-wave scattering by phonon polaritons under excitation of small polarons in LiNbO 3 :Mg

“…Neglecting anisotropy effects, we used (8) and (9) to fit experimental absorption curve for a reduced sample. The value of polaron shift was taken according to position of maximum of absorption: EO.94/2 0.47eV.…”

Cascaded coherent Raman scattering by phonon polaritons

“…Also, it was implied that the scattered element could be regarded as an infinite plane layer. 10 In this work, first, we extend the conventional theoretical model for the cases when the sizes of the scattering area are not very large in comparison with the polariton free path and are bounded in all three directions. Second, we depict the procedure of receiving and processing of experimental results, and finally discuss the results obtained for a crystal of LiIO 3 and crystals of LiNbO 3 doped with Mg and Nd.…”

“…The same calculation scheme is valid in the case of anti-Stokes coherent scattering (ω s D ω L C ω p ), or when the cascade process proceeds due to an intermediate resonance with the certain exciton-like medium state at sum frequency ω 1 C ω 2 D ω p [obviously, Eqns (10) have to be verified according to frequency relationships].…”

“…Analysis of the I s t p distribution provides the measurement of the ratio 3 / 2 1 2 2 and the sign of 2 . 6 -8 Equation ( 18) was obtained earlier 10 for coincident scattering elements in the form of an infinite plane layer. However, in this case the value of Á is not the same.…”