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 …

Terahertz signals were until recently an almost unexplored area of research due to the
difficulties in generation and detection of electromagnetic fields at these wavelengths …

We describe a new four-wave rectification method for the generation of intense, ultrafast
terahertz (THz) pulses from gases. The fundamental and second-harmonic output of an …

Frequency mixing an ultrafast-pulse laser's fundamental and second-harmonic fields in
semiconductors 1, 2, atomic gases 3, 4, and on metal surfaces 5 generates a directional …

The increasingly prominent role of light in information processing makes optoelectronic
devices a technology of fundamental importance. Coherent control of currents in …

The ability to manipulate the multiple properties of light diversifies light-matter interaction
and light-driven applications. Here, using quantum control, we introduce an approach that …

Terahertz (THz) radiation occupies part of the electromagnetic spectrum between the
infrared and microwave bands. Until recently, technology at THz frequencies was under …

Studies of current dynamics in solids have been hindered by insufficiently brief trigger
signals and electronic detection speeds. By combining a coherent control scheme with …

The terahertz (THz) response of the ferroelectric prototype material lithium niobate (LiNbO 3)
is studied in the nonperturbative regime of light-matter interaction. Applying two-dimensional …

We predict that a direct band gap semiconductor (GaAs) resonantly excited by a strong
ultrashort laser pulse exhibits a novel regime: kicked anharmonic Rabi oscillations. In this …