The University of Queensland

University of Leeds

Yah Leng Lim

Alexander Giles Davies

Edmund Harold Linfield

Stephen James Wilson

Dragan Indjin

Paul Dean

Aleksandar D Rakic

Thomas Taimre

Karl Bertling

Aleksander D Rakic

Karl Bertung

A THz quantum cascade laser is used to investigate a target by directing a first beam of laser radiation from the laser at the target to thereby produce a second beam of laser radiation by interaction of the first beam with the target. Self-mixing of the first and second beams occurs within the laser and causes variations in a signal such as the operating voltage of the laser. An operating parameter of the laser that affects the interaction of the first beam with, the target is varied. The operating voltage is monitored and processed to determine phase and amplitude changes associated with material properties of the target. Consequently in one embodiment the invention provides for processing the variations in the signal to produce various images of the target.

Laser system for imaging and materials analysis

Growing community of inventors

Chapel Hill, Australia

Yah Leng Lim