报告题目: Nonlinear Waves in Vertical Cavity Surface Emission Lasers with a Curved Potential
报告时间：2016年6月21日（星期二）10:00
报告地点：尚贤楼402报告厅
报 告人：Ray-Kuang Lee （李瑞光） 教授
报告摘要：With micro-structured vertical cavity surface emission semiconductors (VCSEL), lasing on extremely higher-order whispering-gallery modes, dynamical chaotic modes, superposition of periodic-orbit and non-periodic orbitals, linear and nonlinear surface modes, and crescent waves are demonstrated in experiments and simulations. To have wave localized, the delicate balance of linear and nonlinear effects sustain self-localized solitary waves. However, their observation requires a threshold power that in many cases is not accessible. A challenge is finding mechanisms to reduce this threshold, and the use of optimized geometrical constraints looks a promising strategy. Here we experimentally demonstrate a thresholdless nonlinear localized wave pinned to the boundary of a curvature, in an elliptical-ring potential without any extra formation power. The corresponding lasing characteristics including near/far field and dispersion-relation measurements verify the localization of nonlinear waves.The introduction of curved manifolds opens a new generation for nonlinear optical systems and laser devices with a vanishing power threshold.
报告人简介: Ray-Kuang Lee received his BS degree from the department of Electrical Engineering, National Taiwan University (EE/NTU) in 1997, and his MS and PhD degrees from the Institute of Electro-Optical Engineering, National Chiao Tung University (IEO/NCTU), in 1999 and 2004, respectively. He worked as an assistant scientist at the National Center for High-Performance Computing, Taiwan, from 2001 to 2004, and as a visiting fellow at The Australian National University (ANU), Australia, in 2004. After his graduation, he continued staying in IEO/NCTU as a postdoctoral fellow in 2005. Then, he joined the department of Electrical Engineering and Institute of Photonics Technologies, National Tsing-Hua University (NTHU) as a faculty member at Aug. 2005, where he established the Theoretical Optics Group dedicated to the establishment of theory for optical solitons and vortices in nonlinear systems, slow-light optics, Bose-Einstein condensates, and quantum memory. Currently, he is also an adjunct Professor in the department of Physics, National Tsing-HuaUniversity, the affiliate Scientist of the Physics division, National Center of Theoretical Science, for the research areas in Atom-Molecular-Optics/Interdisciplinary Physics, and was a visiting fellow at the Max-Planck Research Group at Erlangen University, Germany (2006), the Australian National University, Australia (2007, 2010), National Chung-Hsing University Taiwan (2008, 2010), and Kansas State University, United State (2009).
Dr. Lee’s research was recognized as an interdisciplinary work to the societies from theoretical physics, applied photonics, to laser engineering, and due to his contributions, he received the Young Investigator Award from the Academic Sinica, Taiwan (2012), Wu Ta You Memorial Award from the National Science Council, Taiwan (2011), the Outstanding Young Electrical Engineering Award from the Chinese Institute of Electrical Engineering (2010), the Young Theoretical Physician Award from the National Center for Theoretical Science, Taiwan (2010), the Young Optical Engineer Award from the Optical Engineering Society of ROC (2009), the Y. Z. Hsu Scientific Paper Award from the Far Eastern Y. Z. Hsu Science and Technology Memorial Foundation (2010), and the Exploration Research Award from the Pan Wen Yuan Foundation (2009).
Dr. Lee’s group has strong collaborations with several groups worldwide, including Prof. Yu.S. Kivshar’s group in Australia, Prof. M.A. Malomed’s group in Israel, Prof. A.P. Alodjants’ group in Russia, and Prof. W.X. Yang’s group in China. He has published more than 80 technical journal papers, including 5 in Physical Review Letters, 12 in Optics Letters, 7 in Optics Express, and 30 in Physical Review, with total citation > 1100 and H-index = 18. His work Quantum Phase Transitions of Light for Two-level Atoms, was selected as one of “Optics in 2008” by the Optical Society of America (OSA); Absolute frequency of cesium 6S-8S hyperfine transition by two-photon interfered spectrum, Opt. Lett. 38, 3186 (2013), was selected as Spotlight on Optics; Local PT symmetry violates the no-signaling principle, Phys. Rev. Lett. 112, 130404 (2014), was selected as Editors' Suggestion and as Featured in Physi
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