吕新友
华中科技大学
地点：唐仲英楼A313
时间：2018-09-19 15:00
Cavity optomechanics is a rapidly developing research field exploring the radiation-pressure interaction between the electromagnetic and mechanical systems. Strong optomechanical nonlinearity can induce many interesting classical (e.g., optomechanical chaos) and quantum (e.g., photon blockade) phenomena, which makes the optomechanical system (OMS) has wide applications in implementing single-photon quantum processes and secret communication. We proposed two methods to enhance the optomechanical nonlinearity in the classical and quantum domains. (i) In a Parity-Time (PT) symmetric OMS, we found the PT-symmetry-breaking induced dynamical enhancement of optomechanical nonlinearity, and proposed PT-symmetry-breaking chaos, which features an ultralow driving threshold. (ii) We proposed the squeezed optomechanics, which allows the realization single-photon strong-coupling regime even in the originally weak-coupling regime.
吕新友：华中科技大学物理学院教授，博士生导师，国家自然科学基金优秀青年基金和湖北省百人计划获得者。2010年于华中科大学物理学院获博士学位；2011年7月-2014年5月作为访问研究员和日本学术振兴委员会(JSPS)外国人特别研究员在日本理化学研究所（RIKEN）做博士后研究。2014年6月加入华中科技大学物理学院，现主要研究腔光机械系统中的量子操控。至2018年7月已在Phys. Rev. Lett.、Phys. Rev. A/B、Opt. Lett.等期刊发表SCI论文60余篇，论文被SCI引用1500余次（他引1200余次），H因子23。