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Relativistic photonic band gap mirror on chip

片上相对论光子带隙镜

基本信息

批准号：
392102174
负责人：
Dr. Alexander Petrov
金额：
--
依托单位：
Institut für Optische und Elektronische Materialien E-12
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2018
资助国家：
德国
起止时间：
2017-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/392102174?language=en
关键词：
Relativistic photonic band gap mirror

项目摘要

In this proposal we first time draft the route towards experimental realisation of photonic crystal based relativistic mirrors which can be used to dramatically manipulate the frequency and bandwidth of optical signals. For that we propose to realise a system of coupled photonic crystal waveguides and operate it close to the point of degeneracy, also called Dirac point. This degeneracy can be lifted by free carriers generated via two photon absorption of the pump pulse. The lifted degeneracy will constitute a local photonic band gap, where the spatial boundary of this band gap will move with the group velocity of the pump pulse. The optical signal at a frequency within the local band gap will experience reflection with frequency shift and bandwidth change. The proposed system will allow an exploitation of the relativistic mirror in integrated optics technology. The main goals of this project are the realisation of coupled waveguides with small propagation loss close to the Dirac point, as well as efficient injection of the signal and pump pulses into the waveguide system. Afterwards the dynamic experiments of signal reflection from relativistic photonic band gap front are planned. It is expected that the signal duration can be compressed by 10-100 times after reflection without significant frequency shift. Experimental realisation of photonic band gap fronts will also make possible the investigation of other related effects, e.g. spontaneous generation of photons at the front.The project is submitted in the frame of the Joint Sino-German call for proposals organised by the German Research Foundation (DFG) and the National Natural Science Foundation of China (NSFC). It will be conducted in cooperation with Dr. Juntao Li and Dr. Xinlun Cai from Sun Yat-sen University (SYSU), Guangzhou, China. The project at SYSU will concentrate on the design optimization for lithography and ion etching processes and on fabrication of low loss coupled photonic crystal waveguides. The challenge is the adjustment of manufacturing processes for nanometer precision. The applicants at Hamburg University of Technology (TUHH) will design the structures and measure relativistic effects on chip.

在本论文中，我们首次提出了基于光子晶体的相对论反射镜的实验实现路线，该反射镜可用于大幅度地操纵光信号的频率和带宽。为此，我们提出了一个耦合光子晶体波导系统，并在简并点附近操作，也称为狄拉克点。这种简并可以通过双光子吸收泵浦脉冲产生的自由载流子来解除。提升的简并度将形成一个局域光子带隙，该带隙的空间边界将随着泵浦脉冲的群速度移动。在本带隙内某一频率的光信号将发生频移和带宽变化的反射。该系统将使相对论性反射镜在集成光学技术中的应用成为可能。该项目的主要目标是实现在Dirac点附近具有小传播损耗的耦合波导，以及有效地将信号和泵浦脉冲注入波导系统。在此基础上，设计了相对论光子带隙前缘信号反射的动态实验。预计反射后的信号持续时间可以被压缩10-100倍，而不会出现明显的频移。光子带隙前沿的实验实现也将使其他相关效应的研究成为可能，例如光子在前沿的自发产生。该项目是在德国研究基金会（DFG）和中国国家自然科学基金委员会（NSFC）组织的中德联合征稿框架下提交的。该研究将与来自中国广州中山大学（SYSU）的李俊涛博士和蔡新伦博士合作进行。该项目将专注于光刻和离子蚀刻工艺的优化设计，以及低损耗耦合光子晶体波导的制造。目前面临的挑战是为实现纳米精度而调整制造工艺。汉堡工业大学（TUHH）的申请者将设计结构并测量芯片上的相对论效应。