Thomas Lederer

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We demonstrate non-degenerate down-conversion at 810 and 1550 nm for long-distance fiber based quantum communication using polarization entangled photon pairs. Measurements of the two-photon visibility, without dark count subtraction, have shown that the quantum correlations (raw visibility 89%) allow secure quantum cryptography after 100 km of non-zero(More)
We demonstrate the operation of a digital microfluidic lab-on-a-chip system utilizing Electro Wetting on Dielectrics (EWOD) as the actuation principle and a High Fundamental Frequency (HFF; 50 MHz) quartz crystal microbalance (QCM) resonator as a mass-sensitive sensor. In a first experiment we have tested the reversible formation of a phosphor-lipid(More)
We present a natural convection microfluidic loop, based on localized microwave heating of fluids, as a concept for driving flows in 3-dimensional lab-on-a-chip architectures. As a proof of principle we fabricated test devices by using standard power RF-components, originally developed for mobile wireless communication applications, which are combined with(More)
We demonstrate the operation of an Electro Wetting on Dielectrics (EWOD) hybrid lab-on-a-chip system by utilizing a Quartz Crystal Microbalance (QCM) resonator as mass-sensitive sensor. We have tested the formation of a phosphorlipid monolayer out of an aqueous buffer suspension onto the integrated sensor. The altered mass load resulted in a shift of the(More)
An exploratory study of knowledge strategy in a knowledge-intensive firm using a strategy-as-practice approach An exploratory study of knowledge strategy in a knowledge-intensive firm using a strategy-as-practice approach Summary We analyse the knowledge strategy (Zack 1999, 2002) in a knowledge-intensive firm, using a Strategy-as-Practice approach(More)
Micro fluidics is a fast developing research area and is of interest to many scientific groups. Within microfluidic systems micro pumps transport the fluid to different functional areas of a so called Lab-on-a-chip. Up to now electro-magnetically actuated microfluidic pumps make no use of an essential part of electromagnetic systems: A highly permeable core(More)
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