Magnetic modulation of terahertz waves via spin-polarized electron tunneling
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
We demonstrate that the tunneling magnetoresistance (TMR) can be used to modulate terahertz (THz) wave propagation through a magnetic tunnel junctions (MTJ). Operating at the THz frequency range, a maximal modulation depth of 60% is reached for the parallel state of the MTJ with the thickness of 77.45 nm, by using a small magnetic field of 30 mT. The THz conductivity spectrum of the MTJ is governed by the spin-dependent electron tunneling. This findings open that the MTJ device will have potential applications in THz magnetic modulators, filtering and sensing.
Open Access Status
This publication is not available as open access