Generation, detection and coherent control of purely optically generated current pulses

Focus: 
Metrological Instrumentation

In the last few years, the terahertz (THz) frequency range has enjoyed increasing interest. A multitude of applications have been discussed for THz systems, ranging from medical diagnostics and security applications to industrial control processes. In these application fields, THz imaging techniques stand at the focus of current interest. In addition, "in-door" communication with THz waves promises to be a mass-market by 2015. Despite of the promising applications, the THz range is still to be explored and quasi-optic components such as phase shifters, modulators, and attenuators need to be developed.

In his PhD thesis, Mr. Priyadarshi will study semiconductor and liquid crystal based terahertz devices. This includes the characterization of various semiconductor modulators based on two-dimensional electron gases (2DEG). His measurements will lead to a better characterisation and modelling of these devices. Several issues still need to be investigated. In particular, it is expected that the modulation depth is strongly frequency dependent. This, however, needs to be proven.

Mentor/s: 
Bieler
Mentor/s: 
Koch
Mentor/s: 
Siegner
Institution: 
PTB
Institution: 
TU Braunschweig
Status: 
completed
Ph.D. student: 
Priyadarshi