Terahertz-field-induced second harmonic generation through Pockels effect in zinc telluride crystal

Terahertz radiation and second-harmonic generation from InAs: Bulk versus surface electric-field-induced contributions

Polarized second-harmonic generation and terahertz radiation in reflection from 100 , 110 , and 111 faces of n-type InAs crystals are investigated as a function of the sample azimuthal orientation under excitation from femtosecond Ti:sapphire laser pulses. The expressions describing the second-order response optical secondharmonic generation and optical rectification in reflection from zinc-ble...

Near-field second-harmonic generation induced by local field enhancement.

The field near a sharp metal tip can be strongly enhanced if irradiated with an optical field polarized along the tip axis. We demonstrate that the enhanced field gives rise to local second-harmonic (SH) generation at the tip surface thereby creating a highly confined photon source. A theoretical model for the excitation and emission of SH radiation at the tip is developed and it is found that ...

Second harmonic generation in a photonic crystal

Phase-matched electric-field-induced second-harmonic generation in Xe-filled hollow-core photonic crystal fiber.

Second-order nonlinearity is induced inside a Xe-filled hollow-core photonic crystal fiber (PCF) by applying an external dc field. The system uniquely allows the linear optical properties to be adjusted by changing the gas pressure, allowing for precise phase matching between the LP01 mode at 1064 nm and the LP02 mode at 532 nm. The dependence of the second-harmonic conversion efficiency on the...

Electric field-induced optical second harmonic generation in nematic liquid crystal 5CB

Electric field-induced second harmonic generation (EFISH) was studied for the liquid crystal 4-cyano-4'-pentylbiphenyl (5CB) (a nematic phase material at room temperature). The intensity of coherent SHG from 5CB cells upon DC electric field was measured for various initial orientations of the liquid crystal. The dependence of the SHG intensity on the pump beam incidence angle was obtained in tr...