Terahertz generation from ZnTe optically pumped above and below the bandgap
Dongwei Zhai, Émilie Hérault, Frédéric Garet, Jean‐Louis Coutaz
Abstract
We report on the generation of THz waves through optical rectification in ZnTe of femtosecond laser pulses whose photon energy is tuned from below to above the ZnTe bandgap energy. The THz signal exhibits a pronounced peak at the bandgap energy, at THz frequencies for which losses in ZnTe remain small. This peak is likely due to the resonance of the ZnTe nonlinear susceptibility in the vicinity of the bandgap.
Topics & Concepts
Terahertz radiationOptical rectificationFemtosecondMaterials scienceBand gapOptoelectronicsOpticsLaserNonlinear opticsPhoton energyRectificationPhotonPhysicsPower (physics)Quantum mechanicsTerahertz technology and applicationsSemiconductor Quantum Structures and DevicesSpectroscopy and Laser Applications