研究目的
Reviewing the recent development of intense laser-driven terahertz (THz) sources and discussing various types of sources based on optical rectification (OR), spintronic emitters, and laser-filament-induced plasma.
研究成果
The paper concludes that there has been rapid progress in the technologies of generating intense ultrashort THz pulses, with potential for further advancements in THz pulse energies and peak electric and magnetic field strengths. It highlights the potential of THz pulses for nonlinear THz spectroscopy and THz strong-field control over matter.
研究不足
The paper discusses limitations such as the variation of pump pulse duration inside the nonlinear medium, absorption at THz frequencies, nonuniform interaction length in prism-shaped nonlinear crystals, walk-off between pump and THz due to noncollinear geometry, and imaging errors for large pump spot sizes.
