In this days, the journal of Advanced Materials Interfaces published a new paper entitled as “Nanoplasmonic-Enhanced Spintronic Terahertz Emission”
Recently fashionable spintronic terahertz (THz) emission provides fresh pathways for contactless diagnosing femtosecond spin currents, opens the door for developing next-generation high-performance THz emitters, and accelerates the interdisciplinary of ultrafast THz optospintronics. However, one of the research highlights of ultrafast magnetism and the difculty for further improving the spintronic THz emission productivity is how to eficiently reduce the energy consumption of all-optical magnetitic manipulation and improve the optical spin injection efciency. Here, it is demonstrated, for the frst time, gold nanorods (GNRs) plasmonic resonances can eﬀectively increase the THz emission from W/CoFeB/Pt heterostructures by 140%. Systematic investigations of THz yield dependences on pumping laser incidence directionality, polarization, and the GNRs dimension parameter conclusively manifest the surface plasmon resonance validity. Theoretical interpretations combined with Drude–Lorentz model and numerical simulations semiquantitatively reproduce the experimental results. The observations prove that THz efciency can be improvedn by nanophotonic technologies and may also spark inspiration for developing functional nano-THz optospintronic devices.