Abstract:A matrix method for tensor transformations in Voigt notation known from the elasticity calculations has been applied to elasto-optical calculations. Using invariant tensor-to-matrix mapping, the second- and fourth-rank Cartesian tensor transformations and basic operations can be performed by means of matrix multiplication. This approach brings what we believe is a new method of correct tensorial operations in Voigt notation, replacing a well-known approach that allocated specific constants to some matrix eleme… Show more
We have found that
the polarization dependence of Raman
scattering
in organic crystals at finite temperatures can only be described by
a fourth-rank tensor formalism. This generalization of the second-rank
Raman tensor
stems from
the effect of off-diagonal components
in the crystal self-energy on the light scattering mechanism. We thus
establish a novel manifestation of phonon–phonon interaction
in inelastic light scattering, markedly separate from the better-known
phonon lifetime.
We have found that
the polarization dependence of Raman
scattering
in organic crystals at finite temperatures can only be described by
a fourth-rank tensor formalism. This generalization of the second-rank
Raman tensor
stems from
the effect of off-diagonal components
in the crystal self-energy on the light scattering mechanism. We thus
establish a novel manifestation of phonon–phonon interaction
in inelastic light scattering, markedly separate from the better-known
phonon lifetime.
We report on the first-ever demonstration of a Faraday isolator for a large- aperture high-energy pulsed laser. The isolator exhibits a stable isolation ratio of 30.46 dB with the 100 J/10 Hz/10 ns pulses at 1030 nm.
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