Sliver nanowire surface plasmon polaritons enhancement in terahertz nanodevices

Article Number
8874523
Citation
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019)
Contribution to Conference
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 
Publisher DOI
10.1109/IRMMW-THz.2019.8874523
Scopus ID
2-s2.0-85074722646
New types of continuous-wave (CW) THz photomixers were fabricated using a silver nanowire (Ag-NW) as nanocontact on low-temperature-grown (LTG) and nitrogen-ion-implanted GaAs, respectively. The Ag-NW nanoelectrodes produced a large reduction of the device capacitance and a significant enhancement of the photocurrent as compared to conventional photomixers. The combination of very low capacitance and high photocurrent are shown reliable and efficient THz generation in the upper part of the broad spectral THz range. The main enhancement is shown from the wave patterns of surface plasmon polaritons (SPPs) on the Ag-NW which are measured using a scattering-type Scanning Near-field Optical Microscope (s-SNOM)