| Project/Area Number |
10650371
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | Kumamoto University |
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Principal Investigator |
IKUNO Hiroyoshi Kumamoto University, Dept. Electrical and Computer Eng., Professor, 工学部, 教授 (80040400)
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| Co-Investigator(Kenkyū-buntansha) |
YATA Akira Kumamoto University, College of Medical Science, Professor, 医療技術短期大学部, 教授 (90040435)
NAKA Yoshihiro Kumamoto University, Dept. Electrical and Computer Eng., Research Associate, 工学部, 助手 (30305007)
NISHIMOTO Masahiko Kumamoto University, Dept. Electrical and Computer Eng., Associate Professor, 大学院・自然科学研究科, 助教授 (60198520)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | photonic crystal / photonic band gap / multidimensional wave digital filters / FD-TD method / optical circuit devices |
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| Research Abstract |
We have analyzed the characteristics of several kinds of optical waveguides constructed by two-dimensional photonic crystal of circular dielectric rods in air on a square array numerically. The method of solution is finite-difference time-domain (FD-TD) method based on the principles of multidimensional wave digital filters; this method can easily be implemented and is more accurate than the conventional one, the Yee algorithm.
First, we have examined the eigen mode propagation in the photonic crystal optical waveguide and computed its propagation constant using the Prony's method. As a result we have shown that electric and magnetic field intensities in this waveguide oscillate in the period of lattice constant of photonic crystal. Next, we have checked the dispersion relation of this waveguide, and confirm the performance of a single mode propagation, Next, we have analyzed the elementary photonic crystal optical waveguide devices such as a sharp bent waveguide using resonant tunneling, directional coupler, and multiplexer/demultiplexer and evaluated transmission and reflection characteristics of those waveguides. From these results we can conclude that the photonic crystal optical waveguide is a candidate of basic elements for constructing high density integrated optical circuits whose size is on the order of the wavelength of light.
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