告题目:PT 对称光波导网络产生的奇异光学特性
报告时间:2018年5月7日(星期一)9:30
报告地点:理学院报告厅(理-352)
报 告 人:杨湘波 教授(华南师范大学)
报告人简介:
杨湘波,博士,教授,博士生导师。1988年本科毕业于福州大学物理系,获理学学士学位;1991年研究生毕业于华南理工大学光学专业,获理学硕士学位;2000年研究生毕业于华南理工大学材料加工工程专业,获工学博士学位。2002年评为教授、硕士生导师;2011年评为博士生导师。
杨湘波教授以第一作者/通讯作者身份在“Photonics Research”、“Optics Express”、“Physical Review B”等等光学、物理学期刊发表学术论文69篇;主持承担过4项国家基金面上项目及多项省部级项目。目前主要研究兴趣为纳米光子学、人工纳微结构、非线性光学、电子介观输运等的理论研究方面
报告简介:
In this paper, we design a one-dimensional (1D) parity-time-symmetric periodic ring optical waveguide network (PTSPROWN) and investigate its extraordinary optical characteristics. It is found that quite different from traditional vacuum/dielectric optical waveguide networks, 1D PTSPROWN can not produce photonic ordinary propagation mode, but can generate simultaneously two kinds of photonic non-propagation modes, attenuation propagation mode and gain propagation mode. It creates neither passband nor stopband and then possesses no photonic band structure. This makes 1D PTSPROWN possess richer spontaneous PT-symmetric breaking points and appear interesting extremum spontaneous PT-symmetric breaking points, where electromagnetic (EM) waves can create ultrastrong extraordinary transmission, reflection, and localization and the maximum can arrive at 6.6556*1012 and are more than seven orders of magnitude larger than the results reported previously. 1D PTSPROWN may possess potential in designing high efficiency optical energy saver devices, optical amplifiers, optical switches with ultrahigh monochromatity, and so on.
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注:本次讲座将纳入物理系继续教育课程。
理学院
2018年5月4日