2025年1月27日 · The nonlocal dynamic interplay between spin and angular momenta induces additional (spin dependent) electron scattering, consequently leading to THz field amplitude-dependent electrical ...

2023年3月31日 · Antiferromagnetic materials have been proposed as new types of narrowband THz spintronic devices owing to their ultrafast spin dynamics. Manipulating coherently their spin dynamics, however,...

2024年8月22日 · Here, we demonstrate that the optical spin-orbit torque induced by circularly polarized laser can be used to drive free decaying oscillations with a frequency of 2 THz in metallic ...

2025年2月14日 · Here we show that THz spin resonance at the frequency 0.165 THz in collinear antiferromagnet Cr$_{2}$O$_{3}$, which does not host any electromagnons, can be excited by both THz magnetic and electric fields.

2 天之前 · In this study, an L‐shaped metasurface is proposed that achieves perfect spin‐selective absorption in the terahertz (THz) band. Consequently, the absorption efficiencies for right‐handed and left‐handed CP waves attain values of up to 99.9% …

2025年3月10日 · Oxide interfaces have enormous potential for future electronics with many applications, such as large spin Hall conductance, phase transitions, topological states, and superconductivity. However, previous investigations have predominantly focused on gigahertz frequencies; whilst the possibilities to fabricate devices operational at terahertz ...

2024年4月9日 · Optically generated spin current is converted to charge current via multiple spin-charge conversion mechanisms, generating THz wave emission in magnetic multilayers. However, to date, quantitative and comparative investigation of THz emission originating from spin-charge conversion mechanisms has not yet been fully explored.

2024年8月13日 · Here we experimentally demonstrate a THz on-chip spin–valley converter through adiabatic evolution in 2D parameter space without closing the bulk bandgap. By leveraging the adiabatic phase transition, we confirm the high-efficiency conversion between two valley states in a valley–spin–valley converter.

3 天之前 · The THz pulses ensured that the spin current changed direction one trillion times per second. The electrical resistance of the interface also exhibited ultrafast variations. The quantum effect caused a reaction in the THz radiation, altering the THz pulses in a specific way. After penetrating the sample, the THz pulses oscillated at twice the ...

2023年3月15日 · Here, we show that femtosecond laser light combining optical frequency circularly polarized pulse and a terahertz (THz) frequency linearly polarized pulse, a so-called “hencomb” pulse, can generate precisely tailored and 90% pure spin currents for the dichalcogenide WSe 2 and >75% pure valley currents for bilayer graphene with gaps greater ...