| Biography | |
|---|---|
 Prof. Weitao Liu National University of Defense Technology, China |
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| Title: Imaging over scattering media based on second-order coherence | |
| Abstract: Based on autocorrelation of speckle patterns behind scattering media, the image of objects can be retrieved, based on optical memory effect. At the same time, ghost imaging allows to obtain image of an object via signal from a single-pixel detector, based on second-order correlation of the illumination fields, being more powerful against scattering media than traditional active optical imaging. We try to compare between both imaging techniques considering second-order coherence of light fields. Although information of the objects is obtained in different ways, the feature of speckle patterns plays key role in both techniques. That is, second-order coherence of such field appears as a kind of resource which can be used for attracting information of objects, even through strong scattering. Based on this, we propose an approach to take advantages of both techniques, such that imaging within a large field of view under strong scattering can be successfully achieved. Our technique is experimentally verified. | |
| Biography: Wei-Tao Liu has completed his PhD in the year 2009 from National University of Defense Technology, majored in Physics. He became Professor of Physics in 2017 and now is the leader of quantum imaging group. His PhD thesis titled “Photonic entanglement states and their applications” was nominated as a degree thesis of excellence of China. He won the first prize in Natural Science Award of Hunan Province, as the second author in 2015. He is supported by Program for New Century Excellent Talents in University of China, and supported by National Natural Science Funding of China. He has published more than 30 papers in reputed journals. His research interest is quantum optics and quantum information, including photonic entanglement, ghost imaging, weak value measurements, optical imaging against scattering, and also interested in application of compressed sampling in the area of ghost imaging and quantum tomography. | |
