| Project/Area Number |
14540293
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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 |
固体物性Ⅰ(光物性・半導体・誘電体)
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| Research Institution | Chiba University |
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Principal Investigator |
OHTAKA Kazuo Chiba University, Center for Frontier Science, Professor, 先端科学教育センター, 教授 (40010946)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAZAKI Hiroshi Tohoku University, Graduate School of Engineering, Department of Applied Physics, Associate Professor, 大学院・工学研究科, 助教授 (00134007)
INOUE Jun-ichi Chiba University, Center for Frontier Science, Assistant Professors, 先端科学教育センター, 助手 (90323427)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | photonic crystal / leaky photonic band / omni-directional band gap / density of states of photons / Smith-Purcell radiation / Anderson model / Mie resonance / Mie mode / 寿命 |
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| Research Abstract |
1.We have derived the model Hamiltonian to be called the photonic Anderson model, in which the coupling constant between a localized photonic state and an outer plane-wave state is obtained. The model Hamiltonian leads to an optical response of a spherical dielectric system which agrees quite well with the numerical calculation.
2.We derived the formula of the density of states of photons of photonic crystals with a flat surface, which takes account of the finite lifetime of photonic states arising from the leakage of the photonic energy to the exterior region. By using the formula, the calculated photon emission spectrum from an electron traveling near the surface of photonic crystal is analyzed and is shown to be due to the excitation of leaky photonic bands in it.
3.The system called uniformly distributed photonic scatterers is proposed, in which a group of dielectric cylinders are distributed randomly with a sole restriction that the mutual spacing of cylinders is not smaller than a certain minimal value. It is shown that this system has a clear-cut and robust frequency region where the density of states of photons vanishes almost completely. The device application making use of this peculiar system is proposed.
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