Cambridge University Technical Services Limited

Teraview Limited

Yao-Chun Shen

Alexander Giles Davies

Edmund Harold Linfield

Philip Francis Taday

A method of investigating an object, comprising the steps of: (a) irradiating the object with an optically-generated pulse of electromagnetic radiation, said pulse having a plurality of frequencies in the range from 100 GHz to 100 THz; (b) detecting radiation transmitted and/or reflected from the object to obtain a time domain waveform; (c) repeating steps (a) and (b) for a plurality of points on the object and (d) combining data from step (c) to produce a time domain waveform for the object which has been averaged over the plurality of points.

Reducing scattering related features in terhertz time domain spectroscopy by averaging the impulse waveform over a plurality of sample points

The invention relates to improved terahertz radiation sources and associated methods. A terahertz radiation source is described, comprising: an emitter () comprising a semiconductor material (); a pair of electrodes () adjacent a face of said semiconductor, said pair of electrodes defining a gap between said electrodes; a pulsed light source input for illuminating said semiconductor to excite photo-carriers in said semiconductor to generate terahertz radiation; and a radiation collector () to collect said terahertz radiation; and wherein said radiation collector is disposed on the same side of said semiconductor as said electrodes. A related method of providing terahertz radiation is also described.

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Cambridge, United Kingdom

Yao-Chun Shen