Deepening of photonic crystal engineering and its application

本研究项目的目的是探索新的学术前沿，我们称之为光子晶体工程，并使用所获得的概念开发各种器件应用。以下是本项目的主要成果。高Q值纳米腔：我们已经开发出一个250万Q值的200波长尺寸的纳米腔。这个Q因子是我们开始项目时初始值的1000多倍。纳米腔由于其高性能而令世界各地的研究人员感到惊讶，现在被称为Noda的腔，用于各个领域。这两篇描述纳米腔的论文被Thomson ISI评为科学和材料领域引用率最高的论文之一。其中一篇被《自然材料》杂志评选为5周年的10篇最佳论文之一。面内异质结构：本项目提出的面内异质结构概念，使多波 ...更多信息 光子晶体器件的长度操作，同时保持线和点缺陷之间的最佳耦合。这一概念构成了纳米光子器件设计的基本技术，并对全世界这一领域的研究人员产生了重大影响。此外，源于这一概念的各种技术现在被广泛用于制造高性能光子器件。动态控制：迄今为止，对光子晶体的研究主要集中在静态特性上。尤其重要的是，本计画提出并论证了光子晶体特性动态控制的概念。这一概念将是未来光子操纵技术的必然，如光的停止，光量子信息技术等。设备应用：首次研制出了可处理16个波长信道的新型光子晶体分插器件和面内信道分插器件。此外，还提出并论证了实现平顶响应和无偏振工作的方法，取得了多项世界领先的成果，深化了光子晶体工程。其中一项成果发表在《科学》杂志上，另一项发表在《自然》杂志上，另外两项发表在《自然材料》杂志上，另一项发表在《自然光子学》杂志上。这些结果不仅在日本国内，而且在世界各地都引起了极大的关注。少

The purpose of this research project is to explore the new academic frontier which we call Photonic Crystal Engineering and to develop various device applications using the obtained concepts. The followings are the main results of this project.I. High Q nanocavities ; We have developed a cubic-wavelength-size nanocavity with a Q factor of 2.5 million. This Q factor is more than 1000 times the initial value at the point when we started the project. The nanocavity amazed all the researchers around the world due to its high performance, and is now called as Noda's cavity to be utilized in various areas. The two papers describing the nanocavities were awarded from Thomson ISI as one of the highest citation ratio articles in science and material area. Moreover, one of the two papers is selected as one of the 10 best papers when Nature Materials celebrated the 5 years anniversary.II. In-plane heterostructure : The concept of in-plane heterostructure proposed in this project enables multi-wav … More elength operation of photonic crystal devices while maintaining the best coupling between line and point defects. This concept constitutes a fundamental technique for the design of nano-photonic devices and has great impact on all the researchers in this area around the world. Moreover, a variety of techniques stemmed from this concept are now widely utilized to create high performance photonic components.III. Dynamic control : So far, researches on photonic crystals were mainly focused on the static characteristics. It is especially important that the concept of dynamic control of the characteristic of photonic crystals was proposed and demonstrated in this project. This concept will be inevitable for the future photon manipulation technologies such as stopping of light, optical quantum information technologies, and etc. The result was written up by Nature Materials in the section of News & Views.IV. Device applications : Novel photonic crystal based add-drop devices that can process 16 wavelength channels and in-plane channel add-drop devices have been developed for the first time. Furthermore, the methods to obtain a flat-top response and a polarization free operation have been proposed and demonstrated.To summarize, we have succeeded in achieving various world leading results and deepening the Photonic Crystal Engineering. One of these results was published in Science, another in Nature, the other two in Nature Materials and another in Nature Photonics. These results were attracted much attention not only within Japan, but also around the world. Less