Academic and University News

Prof. Shen Guozhen’s Group in Institute of Semiconductors, Chinese Academy of Sciences, with their collaborators in Hong Kong University of Science and Technology developed a flexible UV image sensor based on ZnO quantum dots (QDs) decorated ZTO nanowires (NWs). The device was fabricated on the flexible polyethylene terephthalate (PET) substrate, which displayed outstanding flexibility, electrical stability and folding endurance.

Duo to the rational band engineering at the QD/NW interface which results in effective separation of electron-hole pairs, the device showed ultrahigh specific detectivity (up to 9.0 × 1017 Jones), photoconductive gain (up to 1.1 × 107) and high response speed (47 ms).

EETimes: Non-uniform spatial image sampling has been a popular idea over many decades. University of Glasgow, Scotland, UK, gives it another try in arxiv.org open-acess paper "Adaptive foveated single-pixel imaging with dynamic super-sampling" by David B. Phillips, Ming-Jie Sun, Jonathan M. Taylor, Matthew P. Edgar, Stephen M. Barnett, Graham G. Gibson, and Miles J. Padgett.

"In this work we take a different approach and adopt a strategy inspired by the foveated vision systems found in the animal kingdom - a framework that exploits the spatio-temporal redundancy present in many dynamic scenes. In our single-pixel imaging system a high-resolution foveal region follows motion within the scene, but unlike a simple zoom, every frame delivers new spatial information from across the entire field-of-view. Using this approach we demonstrate a four-fold reduction in the time taken to record the detail of rapidly evolving features, whilst simultaneously accumulating detail of more slowly evolving regions over several consecutive frames."