Home > 新闻动态 > The academic lecture by associate professor Chai Yang of the Hong Kong Polytechnic University was successfully held

On November 10, 2021, at the invitation of Zhang Min, associate professor Chai Yang of the Department of Applied Physics of Hong Kong Polytechnic University came to Shenzhen Graduate School of Peking University for academic exchange and shared the research results of “bio-inspired in sensor visual adaptation for accurate perception”. The lecture was held in classroom c-202, with IEEE EDS / SSCs Shenzhen Branch as the cooperative organizer, which attracted the enthusiastic participation and active discussion of many teachers and students from SECE.
Dr. Chai Yang graduated from Hong Kong University of science and technology, then engaged in post doctoral research at Stanford University and Illinois State University at champagne, and joined the Department of Applied Physics of Hong Kong Polytechnic University in 2012. The main research interests include controllable growth of low dimensional materials and electronic devices, energy conversion and storage, and flexible electronic devices.
In this lecture, Pro. Chai Yang showed a bionic vision sensor based on molybdenum disulfide phototransistor, which can show time-varying excitation and suppression characteristics, can be applied to light sensing terminals in many actual scenes, and the light intensity of the vision sensor can well comply with Weber’s law. The phototransistor shown in this work can realize high localization and dynamic modulation of light sensitivity, so it can realize visual adaptation under different lighting conditions at the pixel level, and has an effective sensing range of up to 199 db. In addition, the phototransistor array can adaptively process the image in both dark and light, so as to enhance the contrast of the image after processing.
After the lecture, many teachers and students actively asked questions from their professional background. Chai Yang patiently interacted with the on-site teachers and students to discuss the uniformity of transistor array and long-term synaptic characteristics. This activity not only broadened the scientific research vision of the teachers and students present, but also stimulated many new scientific research inspiration, and established an academic “bridge” for the discussion of follow-up scientific research issues.

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