Linear detection of coherent synchrotron radiation emitted by single electron bunches using zero-biased InGaAs Schottky diode detectors

Using a range of zero-biased InGaAs Schottky diode detectors, terahertz coherent synchrotron radiation emitted by individual electron bunches has been detected. The source was the UK's Diamond Light Source synchrotron operating in low-alpha THz mode. Detected signals have a FWHM of <;50 picoseconds, and a spectral bandwidth of 0.2 - 3 THz. Due to the sensitivity, high linearity and fast recovery of the detectors, we were able to record the THz emission from a series of bunches over several synchrotron round trips.