| Budget Amount *help |
¥439,920,000 (Direct Cost: ¥338,400,000、Indirect Cost: ¥101,520,000)
Fiscal Year 2007: ¥89,570,000 (Direct Cost: ¥68,900,000、Indirect Cost: ¥20,670,000)
Fiscal Year 2006: ¥92,170,000 (Direct Cost: ¥70,900,000、Indirect Cost: ¥21,270,000)
Fiscal Year 2005: ¥95,680,000 (Direct Cost: ¥73,600,000、Indirect Cost: ¥22,080,000)
Fiscal Year 2004: ¥82,940,000 (Direct Cost: ¥63,800,000、Indirect Cost: ¥19,140,000)
Fiscal Year 2003: ¥79,560,000 (Direct Cost: ¥61,200,000、Indirect Cost: ¥18,360,000)
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| Research Abstract |
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
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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
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