An Antenna-coupled Electric Wave Detector For Microwave And Infrared Ray

Detector of an antenna-coupled electric field detection type for infrared ray is investigated. As infrared ray is one of the electromagnetic waves, so this detector receives infrared ray at an antenna, and rectifies at a nonlinear element that has high-speed response. The antenna of this device formed by lift-off process at a size of similar rank as wavelength. The rectifying device formed it as making use of a very small hole depending on FIB to be able to respond to frequency of an infrared ray. As experimental results, this detector receives microwaves'electric fields (f=50Ghz, 300mW) and converts it to the signal voltage (1.3mV). It is certified that the signal voltage is obtained through micro antenna by measuring angular dependence between antenna and polarization of microwave. From another experiments, the detector could receive C)/sub 2/laser(/spl lambda/=10.6/spl mu/m). Also, this device detected an inside electric field of a waveguide and revealed what we can use as a position sensor.