Inhaltszusammenfassung

We demonstrate antenna-coupled spintronic terahertz (THz) emitters excited by 1550 nm, 90 fs laser pulses. antennas are employed to optimize thz outcoupling and frequency coverage of ferromagnetic/nonmagnetic metallic spintronic structures. we directly compare the antenna-coupled devices to those without antennas. using a 200 mu m h-dipole antenna and an eras: ingaas photoconductive receiver, we obtain a 2.42-fold larger thz peak-peak signal, a bandwidth of 4.5 thz, and an increase in the pea...We demonstrate antenna-coupled spintronic terahertz (THz) emitters excited by 1550 nm, 90 fs laser pulses. antennas are employed to optimize thz outcoupling and frequency coverage of ferromagnetic/nonmagnetic metallic spintronic structures. we directly compare the antenna-coupled devices to those without antennas. using a 200 mu m h-dipole antenna and an eras: ingaas photoconductive receiver, we obtain a 2.42-fold larger thz peak-peak signal, a bandwidth of 4.5 thz, and an increase in the peak dynamic range (dnr) from 53 db to 65 db. a 25 mu m slotline antenna offered 5 db larger peak dnr and a bandwidth of 5 thz. for all measurements, we use a comparatively low laser power of 45 mw from a commercial fiber-coupled system that is frequently employed in table-top thz time-domain systems. published under license by aip publishing.» weiterlesen» einklappen

Autoren

Klassifikation

DDC Sachgruppe:
Physik