Reliable modulation of terahertz electromagnetic waveforms is important for many applications. Here, we rapidly modulate the direction electric field linearly polarized pulses with 1–30 THz bandwidth by applying time-dependent magnetic fields to a spintronic emitter. Polarity more than 99% contrast at rate 10 kHz achieved using harmonic field. By adding static field, between angles of, instance...

We propose a sub-wavelength range-based dual-band tunable ideal terahertz metamaterial perfect absorber. The absorber structure consists of three main layers, with the layer consisting metal I-shaped structure. By simulating incident wave absorbance structure, we found that has more than 99% absorption peaks in both bands. In addition, have investigated relationship between structural and geome...

Significant progress has been made in answering fundamental questions about how and, more importantly, on what time scales interactions between electrons, spins, and phonons occur solid state materials. These complex are leading to the first real applications of terahertz (THz) spintronics: THz emitters that can compete with traditional sources provide additional functionalities enabled by spin...

Studies on the generation of terahertz (THz) radiation in p-n-heterostructures based a-Si:H/c-Si upon their photoexcitation by a femtosecond titanium-sapphire laser with wavelength 800 nm are presented. The properties observed THz allow to explain its nature excitation fast photocurrent nonequilibrium charge carriers created region potential barrier under interband structure. photocurrent, turn...