Fig. 3: Spectral responsivity of the sub-THz receivers.
From: High-speed graphene-based sub-terahertz receivers enabling wireless communications for 6G and beyond
a Responsivity of the investigated devices as a function of the charge carrier mobility of graphene. The highest responsivity is observed for the hBN-encapsulated exfoliated graphene receiver, which exhibits the highest mobility. The data points are clustered for receivers based on CVD graphene (green circle) and hBN-encapsulated exfoliated graphene (light blue). b Optical simulations of the field intensity at the graphene channel with and without the back mirror (bm) within the measured spectral range. c Responsivity spectra of Device 2 (D2), which is based on CVD graphene with alumina as the dielectric. The highest responsivity is achieved in the presence of the back mirror and with the incident sub-THz radiation polarization (pol) parallel to the antenna main axis.
