Elevator pitches are characterized by their high entertainment value with a certain depth: in 2 - 3 minutes, ideas should be conveyed to the audience in an exciting way. This was also the case at the HotStuffAward of the Leistungszentrum Photonics on September 17 in the foyer of the Fraunhofer IOF as part of the Photonics Days 2018 program. Eight ideas were presented in this way and four were awarded prizes of 20,000 - 10,000 €!

1st place went to David Schmelz with the topic "KOH wet etching for backside thinning of Ge-on-Si photodetectors". The idea is based on the fact that germanium is first applied to silicon as a cost-effective alternative to InGaAS for the spectral range from 1-2 μm. By illuminating the back of the substrate, microoptical elements can be arranged there. In order to bring these closer to the diode, a backside thinning by means of KOH wet etching is recommended. The prize-winning idea here is that special silicon wafers with an embedded oxide layer (SOI wafer) are used to achieve the desired etching depth. This layer acts as an etch stop and thus enables the exact achievement of the desired target depth.

2nd place went to Jan Sperrhake with the idea of a single-pixel hyperspectral camera: here an image sensor chip is connected to a spectrometer and a 2D image is generated by a matrix arrangement of micro mirrors (compressed sensing). The special thing about this is that the mirrors shutter according to a statistical correlation (e.g. like a QR code) and provide corresponding image information, where their position in turn provides the information about the position of the pixel. Using a correlation function, the image is then calculated, with each pixel corresponding to a full spectrum. In addition, this method can save both hardware costs and time in the image calculation.

Falk Eilenberger and Markus Gräfe, who want to generate quantum random numbers with the help of photonic quantum random number generators developed at the Fraunhofer IOF and then make them available to the scientific world for data analysis and for IT encryption concepts, are happy about third place.

Last but not least, David Zakoth - an colleague from the Lichtwerkstatt - even won a special prize for the idea of an autonomous drone for medical aid.

All the prize winners were endowed with several thousand euros so that they could actually put their ideas into practice in the near future - we are looking forward to it!

Participants and winners: 4th from left: David Schmelz, centre front: David Zakoth, 2nd from right: Jan Sperrhake and right: Falk Eilenberger.
(Rights: Fraunhofer IOF)

News from: 25.09.2018 15:00
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