A multi-frequency receiver for receiving plural frequencies of
electromagnetic radiation (e.g., light) using a beam of charged particles
shared between plural resonant structures. The direction of the beam of
charged particles is selectively controlled by at least one deflector.
The beam of charged particles passing near the resonant structure is
altered on at least one characteristic as a result the presence of the
electric field induced on the corresponding resonant structure.
Alterations in the beam of charged particles are thus correlated to data
values encoded by the electromagnetic radiation.