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Training in: Epitaxial growth of novel semiconductor nanostructures, optical and structural characterization of materials, device processing in clean room and optoelectronic characterization.
Efficient light sources and detectors for the mid-infrared wavelength range between 2 and 7 µm are key for optical gas sensing systems and enable a broad range of applications spanning from medical diagnostics, environmental monitoring to safety applications. Interband cascade lasers and detectors enable lowest threshold current densities and large detectivities, respectively, and are hence good candidates to be utilized in this emerging field.
The research will focus on the design, fabrication (epitaxial growth and nano-structuring) and characterization of interband cascade nanostructures and superlattices based on the antimonide-related 6.1A material system. The goal of the project is to develop optimal light sources and detectors based on the interband cascade (IC) scheme to be employed in tunable laser based gas sensing applications in the mid-infrared wavelength region (2-7 µm). We seek to investigate in detail the electronic transport properties of InAs/GaSb semi-metallic quantum wells in combination with InAs/AlSb superlattices, which are the building blocks of interband cascade sources and detectors.
The experimental work will be comprised of the epitaxial growth of samples containing InAs/GaSb interfaces and superlattice, the characterization of the barrier and quantum well layer morphology by use of scanning and transmission electron microscopy and atomic force microscopy, as well as their optical properties by several spectroscopic setups. Electro-optical characterization tools will be used to characterize and optimize the relevant figure of merits, such as quantum efficiency, detectivity, output power, wall-plug efficiency etc.
How to Apply
- An internal application form listing your academic and job records (.docx template available here).
- A free format CV (pdf format max 2 Mb)
- Official documentation such as degree and grades certificates will be required at a later stage.