Reconstruction of the Coordinate Dependences of Quadratic Susceptibility Tensor Components for the One-Dimensionally Inhomogeneous Absorbing Mediumстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A method for the unambiguous reconstruction of the spatial profiles of all components (except for $\chi_zzz$) of the quadratic susceptibility complex tensor $\chi(z,\omega_1 +\omega_2; \omega_1, \omega_2)$, which is responsible for the sum-frequency generation in a one-dimensionally inhomogeneous plate is proposed and proven for the first time. Such reconstruction is possible if the symmetry of the medium provides the diagonal character of the linear permittivity tensor $\epsilon(z,\omega)$. The procedure involves the measurement of the complex amplitude of the new wave with the frequency $\omega_1 + \omega_2$ that is reflected from the plate for a certain interval of the angles of incidence of the wave with the frequency $\omega_2$. The reflected wave results from the nonlinear interaction of the wave with frequency $\omega_2$ and the wave with frequency $\omega_1$ that exhibits the normal incidence. A similar approach can be used to determine the profiles of the components of the quadratic susceptibility tensor $\chi(z,\omega_1 -\omega_2; \omega_1, -\omega_2)$ which is responsible for the difference-frequency generation.