Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Universitat Basel Vizerektorat Forschung

Tino Topper

Joachim Wagner

Marcel Rattunde

Bekim Osmani

Bert Mueller

Sebastian Kaspar

For improving the sensitivity, lifetime and energy consumption of a dielectric elastomer transducer () to be used as a sensor, it is suggested that a dielectric layer () enclosed by two electrodes () of the transducer () includes a nanoscale volume of a fluid () such that the dielectric layer () is rendered compressible and/or displaceable out of a volume enclosed by the two electrodes (). The advantage of such a design is that, although the dielectric layer () and possible buffer layers () separating the electrodes () from the dielectric layer () may all have thicknesses in the order of a few μm or even in the sub-μm range, the transducer () is rendered highly compliant due to the movability of the fluid (). In consequence, a large nominal capacitance of the transducer () as well as a large relative capacitance change (up to twenty times that of the nominal capacitance) can be achieved in conjunction with a very high sensitivity.

Dielectric elastomer transducer and corresponding fabrication process

An optically pumped semiconductor disk laser including a pump light source, at least one semiconductor body (), which semiconductor body () has at least one window region (), an active region () and a reflection device (P), which reflection device has at least one first P-reflection element (P) for the pump wavelength. The first P-reflection element (P) is embodied and arranged such that pump light emerging from the pump light source () can be guided for at least two passes through the active region (). A total thickness of the active region () and of the window region () in the direction of an optical axis of the semiconductor disk laser is less than three times the laser wavelength in the active region ().

Optically pumped semiconductor disk laser

Growing community of inventors

Freiburg, Germany

Tino Topper