WebApr 13, 2024 · Sound generation by a femtosecond laser pulse in a metal layer on a dielectric substrate is studied. The excitation of sound caused by the effect of the ponderomotive force, temperature gradients of electrons, and lattice is considered. A comparison is made of these generation mechanisms for various excitation conditions … WebDec 19, 2024 · The terahertz (THz) gap generally refers to the frequency band in the range of 0.1 to 10.0 THz, located between the microwave and infrared regions of the electromagnetic spectrum [].In addition, terahertz radiation can penetrate without destroying most non-polar materials, similar to the properties of microwaves, and has applications in …
Researchers develop a high-power, portable terahertz laser
WebDec 16, 2024 · We report on high-order harmonic generation in the two-band superconductor ${\mathrm{MgB}}_{2}$ driven by intense terahertz electromagnetic pulses. Third- and fifth-order harmonics are resolved in time domain and investigated as a function of temperature and in applied magnetic fields crossing the superconducting phase … WebJul 7, 2016 · We present the current status of high-performance, compact, THz sources based on intracavity nonlinear frequency generation in mid-infrared quantum cascade … homedics humidifier warm mist
Terahertz spectral investigation of temperature induced polymorphic ...
WebFeb 23, 2024 · It has been envisioned that the metal–semimetal–metal device exhibits an order of magnitude performance improvement at terahertz frequency when the Fermi level is aligned with the Dirac node (i.e., x ∼ 0.3) and a room-temperature photoresponsivity of 0.52 A·W –1 at 0.12 THz and 0.45 A·W –1 at 0.3 THz, which benefited from the ... WebSep 13, 2024 · The electric field of the terahertz probe was aligned perpendicular to the c -axis of the α -quartz sample. We present the temperature-dependence of the \sim 3.9 … WebNov 2, 2024 · Until now, generation of terahertz radiation powerful enough to perform real-time imaging and fast spectral measurements required temperatures far below 200 … homedics humidifier ultrasonic manual