Joshua R. Smith receives funding from the National Science Foundation, the National Institutes of Health, the Department of Energy, the Department of Defense Medical Command, DARPA, Bosch, and Amazon.

A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch that ...

This series of projects explore concepts of radio communications. We use LEDs to generate (very high frequency) radio waves and photo-resistors to take the place of radio antennas. These ideas are ...