Open AccessThe propagation effects in ultrafast nonlinear electro-optical modulation in thin film on a substrate
Author(s) -
Vladislav Bilyk,
K. A. Grishunin,
N. É. Sherstyuk,
Е. Д. Мишина,
А. В. Овчинников,
O. V. Chefonov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1556/1/012009
Subject(s) - terahertz radiation , substrate (aquarium) , materials science , ultrashort pulse , optoelectronics , ferroelectricity , modulation (music) , optics , thin film , transient (computer programming) , nonlinear optical , nonlinear system , optical disc , physics , laser , nanotechnology , oceanography , quantum mechanics , computer science , acoustics , dielectric , geology , operating system
The propagation of short optical and terahertz pulses through a noncentrosymmetric (ferroelectric) film on a centrosymmetric substrate is considered. The effect of terahertz electro-induced second harmonic generation is observed in the film. It is shown that the difference in the group velocities of THz and optical pulses leads to a non-mirror-like dependence of the transient nonlinear-optical response upon a mirror image of the film–substrate structure relative to its surface.