A 0.31-THz Orbital-Angular-Momentum (OAM) Wave Transceiver in CMOS With Bits-to-OAM Mode Mapping

This article reports the first chip-based demonstration (at any frequency) of a transceiver front end that transmits and receives electromagnetic waves with a helical distribution of wavefront phase [namely, orbital angular momentum (OAM)]. The CMOS chip consists of eight 0.31-THz modulator/detector units, with an integrated patch antenna, which are placed in a uniform circular pattern with a diam...