title: Carbon nanotube radio.
abstract: Here we report experimental results for a carbon nanotube (CNT) based amplitude-modulated (AM) demodulator for modulation frequencies up to 100 kHz. Further, the CNT based demodulator was successfully demonstrated in an actual AM radio receiver operating at a carrier frequency of 1 GHz and capable of demodulating high-fidelity audio. The demodulation originates from the nonlinear current-voltage (IDS vs VDS) characteristic of the CNT, which induces rectification of a portion of the applied RF signal. By properly biasing the CNT such that the operating point is centered on the maximum nonlinear portion of the I-V curve, one can maximize the demodulation effect. This represents a simple application of carbon nanotubes and nanotechnology to the wireless realm.
authors.affiliation: Department of Electrical Engineering and Computer Science, University of California, Irvine, California 92697, USA.
authors.forename: Chris
authors.initials: C
authors.lastname: Rutherglen
authors.forename: Peter
authors.initials: P
authors.lastname: Burke