Sensors (NL3)

We are engaged in the research and development of optical nanosensors. We focus on hybrid structures consisting of organic and inorganic materials, such as strongly polar semiconductor surfaces coated with organic molecules or ultra-thin polymer films.

Our research group consists of scientists from the Institute of Applied Physics (IAP) and from the Institute of Semiconductor Technology (IHT) of the TU Braunschweig.

The interaction between molecules and III-nitride-based semiconductor surfaces and its use for optical nanosensors will be investigated in three steps:

In situ investigations of pure III-nitride-surfaces on top of buried quantum-wells using photoluminescence and cathodoluminescence inside a molecular beam epitaxy system. The effect of surface oxides and adsorbates will be analyzed by comparing the results with ex situ spectroscopy investigations. By varying the composition and doping of the structures, the strength and penetration depth of surface fields can be adapted.
Surface functionalization using monolayers of suitable organic molecules or ultra-thin polymer films.
Fabrication of optical nanosensors using specific molecules and detection of optical transitions in buried quantum-wells.

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