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学术报告


7月24日冯亮报告

发布时间:2017-07-21

报告时间:7月24日 周一 上午10:00

报告地实验室一楼会议室

报告人:冯亮(Department of Materials Science and Engineering, University of Pennsylvania)

报告题目: Quantum Inspired Photonics

报告摘要:

    Quantum mechanics, dealing with atoms and electrons on a single-particle level, is the basis of modern technologies in computing and communication. While photonics is considered a completely different research subject, its intrinsic capability of creating non-Hermitian Hamiltonians by optical gain and loss makes it an ideal platform to explore various quantum symmetry paradigms that were deemed impossible in the past. In this seminar, I will present our recent efforts on the quantum inspired photonics where quantum symmetries (such as parity-time symmetry) guide the design of nanophotonics for unprecedented optical properties. Although it was widely believed that optical loss is detrimental in photonic applications, I will start from an opposite viewpoint and develop a new paradigm of positively manipulating optical losses, demonstrating unidirectional light-matter interaction tailored at a “quantum” exceptional point in the complex dielectric permittivity domain. Moreover, I will discuss harnessing optical losses for unique microlaser functionality. In particular, I will focus on an orbital angular momentum (OAM) microlaser that structures and twists the lasing radiation at the microscale, which is expected to address the growing demand for information capacity. These quantum explorations not only provide positive impacts on fundamental quantum physics but also facilitate technological breakthroughs in photonic materials. Hence, researches in quantum inspired photonics of such two-fold benefits are advancing both fields simultaneously.

报告人简介:

    Liang Feng is currently an Assistant Professor of Materials Science and Engineering at the University of Pennsylvania. He received his Ph.D. in Electrical Engineering from UCSD in 2010, and was subsequently a postdoc researcher at California Institute of Technology and the NSF Nanoscale Science and Technology Center at UC Berkeley. Prior to joining Penn, he held an assistant professor position at SUNY Buffalo from 2014 to 2017. He has authored and coauthored over 50 papers in a variety of journals including Science, Nature Materials, Nature Photonics and PRL. He is a recipient of the U.S. Army Research Office Young Investigator Program (YIP) Award in 2016.