Patent ID: 8253104

Claim:
A terahertz wave detecting apparatus comprising: a semiconductor chip in which a 2-dimensional electron gas is formed at a constant position from from a surface of the semiconductor chip; a carbon nanotube, a conductive source electrode, a conductive drain electrode and a conductive gate electrode provided in close contact with the surface of the semiconductor chip, in which the carbon nanotube extending along the surface of the semiconductor chip and having both ends connected to the source electrode and the drain electrode on the semiconductor chip, and the gate electrode being spaced at a constant interval from the side surface of the carbon nanotube; a SD (source-drain) current detecting circuit for applying a predetermined voltage between the source electrode and the drain electrode and for detecting a SD current therebetween; a gate voltage applying circuit for applying a variable gate voltage between the source electrode and the gate electrode; and a magnetic field generating device for applying a variable magnetic field to the semiconductor chip.