报告人简介：

  Prof. Qiaoliang was enrolled into China Thousand Youth Talent Program in   2012. He obtained ARC Future Fellowship in 2016 and is now a tenured   Associate Professor at Department of Materials Science and Engineering,   Monash University, Australia. He has authored or co-authored more than 190   refereed journal articles with more than 20,000 total citations and an H-index of   60 (Google Scholar). His research involves the investigation of waveguide-coupled 2D semiconductors and polariton-coupled 2D materials and devices, focusing on the effect of confined-space light-matter interactions on the transport of electrons or other quasi-particles such as plasmon polariton, exciton polarition and phonon polariton.

摘要：

  Our research interests are mainly focused on the light-matter interactions in 2D materials in the forms of nonlinear light absorption, light modulation (amplitude, phase and polarisation), photo-electrical conversion, wave-guiding and polaritonic behaviours. This talk will give an overview of photonic and optoelectronic device applications based on these optical phenomena in 2D materials. Firstly, to overcome the limit light absorption in graphene and obtain large nonlinear optical modulation depth, we developed a serial of new saturable absorbers based on graphene heterostructures and other 2D materials, including graphene/Bi2Te3, black phosphorus and self-doped plasmonic 2D Cu3-xP nanosheets as well as 2D halide perovskite. Secondly, in order to fabricate improved graphene photodetectors working in different spectral ranges, we integrated graphene with other 2D materials with variant electronic structures. Lastly, the THz light modulations associated with plasmonic excitation in graphene/Bi2Te3, topological insulator Bi2Te3, graphene nanoribbon and 3D graphene were investigated using either spectroscopic or real space imaging techniques. We developed a surface plasmon resonance (SPR) sensor using antimonene materials, and found that such a sensor using new, more sensitive materials to look for key markers of disease in the body increased detection by up to 10,000 times. In particular, we update our recent progress on the observation of anisotropic and ultra-low-loss polariton propagation along the natural vdW material α-MoO3. In summary, the advances of optical researches in 2D materials may pave the way for the next generation photonic and optoelectronic device applications.

主 持  人：张永来 教授

报告时间：2019年4月26日15:00

报告地点：唐敖庆楼D311报告厅

主办单位：电子科学与工程学院

           集成光电子学国家重点实验室

           物质科学吉林省高校高端科技创新平台

           国家高等学校学科创新引智基地