Over the past three decades a new spectroscopic technique with unique possibilities has
emerged. Based on coherent and time‐resolved detection of the electric field of ultrashort …

We review pioneering and recent studies of the conductivity of solid state systems at
terahertz frequencies. A variety of theoretical formalisms that describe the terahertz …

The development of artificially structured electromagnetic materials, termed metamaterials,
has led to the realization of phenomena that cannot be obtained with natural materials. This …

Utilizing terahertz time domain spectroscopy, we have characterized the electromagnetic
response of a planar array of split ring resonators (SRRs) fabricated upon a high resistivity …

Ultrashort terahertz pulses derived from femtosecond table-top sources have become a
valuable tool for time-resolved spectroscopy during the last two decades. Until recently, the …

We demonstrate optical switching of electrically resonant terahertz planar metamaterials
fabricated on ErAs/GaAs nanoisland superlattice substrates. Photoexcited charge carriers in …

During the past decade electromagnetic metamaterials have realized many exotic
phenomena that are difficult or impossible using naturally occurring materials. It is their …

Time-resolved terahertz spectroscopy is used to probe ultrafast carrier dynamics and
terahertz conductivity in photoexcited thin films of silicon nanocrystals, polynanocrystalline …

Controlling the propagation properties of terahertz waves is very important in terahertz
technologies applied in high-speed communication. Therefore a new-type optically tuned …

Tunable slow light systems have gained much interests recently due to their efficient control
of strong light–matter interactions as well as their huge potential for realizing tunable device …