Enhancement of the guided-wave second-harmonic generation in the form of Cerenkov radiation

Abstract

Articles you may be interested inTheoretical analysis of enhanced second-harmonic generation based on a self-formed antiguide structure

Three-dimensional ferroelectric domain visualization by Čerenkov-type second harmonic generation

“…For example, it has been suggested that the quadratic nonlinearity χ (2) of ferroelectric crystals may be enhanced by the presence of a strong DC electric field created by the strain at the walls [10]. Another possible reason could be the constructive interference of the second harmonic waves generated by different parts of the fundamental beam that covers simultaneously regions belonging to two anti-parallel ferroelectric domains [8,30]. Regardless of its exact physical origin, the strong enhancement ofČerenkov SHG emission in the area of the domain wall, is a clear experimental fact and can be employed for a direct 3D visualization of the inverted domain pattern hidden inside the NPS.…”

Čerenkov-type second-harmonic generation with fundamental beams of different polarizations

“…1(a)]. While the demonstrations of the Č erenkov SHG in bulk nonlinear crystals have been reported [1,3,4], this type of SHG is more often realized in the waveguide geometry [1] because of higher light intensities [5][6][7][8].…”

Mode-coupling Cerenkov sum-frequency-generation in a multimode planar waveguide

“…In optical waveguides, such an emission can also occur via a second-order nonlinear process. [2][3][4][5][6][7][8][9][10][11][12][13][14] In 1970, Tien et al reported Cerenkov second harmonic generation ͑SHG͒ in ZnS film. 2 Since then, the applications 3,4 and theoretical investigations of Cerenkov SHG ͑Refs.…”