Chemical and physical systems undergoing change display spectral signatures from the
radio frequency to the X-ray region of the electromagnetic spectrum. This has led to the …

Nonlinear optical spectroscopies are powerful tools for investigating both static material
properties and light-induced dynamics. Terahertz (THz) emission spectroscopy has …

In typical semiconductor solar cells, photons with energies above the semiconductor
bandgap generate hot charge carriers that quickly cool before all of their energy can be …

Multiple exciton generation (MEG) refers to the creation of two or more electron-hole pairs
from the absorption of one photon. Although MEG holds great promise, it has proven …

Our study of THz wave generation in the pulsed laser induced air plasma with individually
controlled phase, polarization, and amplitude of the optical fundamental wave (ω) and its …

We report the experimental results and theoretical analysis of broadband detection of
terahertz (THz) waves via electric-field-induced second-harmonic generation in laser …

Terahertz (THz) radiation occupies that region of the electromagnetic (EM) spectrum
between approximately 0.3 and 20 THz. Recent advances in methods of producing THz …

In recent years, optical second-harmonic generation has matured into a versatile and
powerful technique for probing the electronic and structural properties of buried solid–solid …

Ultrabroadband, intense terahertz (THz) waves can be generated and detected using
gaseous media as both the THz wave emitter and sensor, with a bandwidth covering the …

We investigate polarization-dependent ultrafast photocurrents in the Weyl semimetal TaAs
using terahertz (THz) emission spectroscopy. Our results reveal that highly directional …