2010 Fiscal Year Final Research Report
Challenge of new extreme material science using high-energy THz source
| Project/Area Number |
20686005
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Utsunomiya University |
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Principal Investigator |
HIGASHIGUCHI Takeshi Utsunomiya University, 工学研究科, 准教授 (80336289)
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| Project Period (FY) |
2008 – 2010
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| Keywords | テラヘルツ / 極限物性科学 / 軟X線 / 極端紫外 / 吸収分光 |
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| Research Abstract |
We have demonstrated table top terahertz electromagnetic wave source and extreme ultraviolet light source by using a controlled plasma produced by an ultrashort, intense laser pulse and pulse discharge. The terahertz radiation can be generated by the burst current produced by a laser created ionization front, which is induced an optical-field-induced ionization in air with a static electric field. The experimental results behave similarly to calculated results, and electric field amplitude of THz radiation increase with increase in applied voltage of a static electric field. We also have demonstrated a discharge-produced microplasma extreme ultraviolet source based on a pure potassium vapor. Potassium ions produced strong broadband emission around 40nm with a bandwidth of8 nm [full width at half-maximum (FWHM)]. The current-voltage characteristics of microdischarge suggest that the source operates in a hollow cathode mode. By comparison with atomic structure calculations, the broadband emission is found to be primarily due to 3d-3p transitions in potassium ions ranging from K^<2+> to K^<4+>.
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[Journal Article] Microdischarge extreme ultraviolet source with alkali metal vapor for surface morphology application2011
Author(s)
Takeshi Higashiguchi, Hiromitsu Terauchi, Takamitsu Otsuka, Mami Yamaguchi, Keisuke Kikuchi, Noboru Yugami, Toyohiko Yatagai, Wataru Sasaki, Rebekah D'Arcy, Padraig Dunne, Gerry O'Sullivan
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Journal Title
Journal of Applied Physics Vol.109
Pages: 013301-1-013301-6
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[Presentation] Spectral and Temporal Behaviors of Alkali Metal Vapor Extreme Ultraviolet Sources for Surface Morphology Applications2011
Author(s)
Takeshi Higashiguchi, Hiromitsu Terauchi, Mami Yamaguchi, Takamitsu Otsuka, Noboru Yugami, Rebekah D'Arcy, Padraig Dunne, Gerry O'Sullivan
Organizer
2010 International Workshop on Extreme Ultraviolet Sources, S12-2
Place of Presentation
University College Dublin, Dublin, Ireland
Year and Date
2011-11-15
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[Presentation] 超短パルスレーザー駆動パルス放電によるテラヘルツ放射2010
Author(s)
東口武史, 柏崎宏明, 大塚崇光, 宮澤準, 大場貴文, 鈴木光騎, 湯上登, 千徳靖彦, 兒玉了祐
Organizer
日本物理学会,2010年秋季大会,23pQJ-2
Place of Presentation
大阪府立大学中百舌鳥キャンパス(大阪府堺市)
Year and Date
2010-09-23
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