2007 Fiscal Year Final Research Report Summary
Advanced Application of Laser-Excited Terahertz Waves
| Project/Area Number |
15106002
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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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 | Osaka University |
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Principal Investigator |
MASANORI Hangyo Osaka University, Institute of Laser Engineering, Professor (10144429)
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| Co-Investigator(Kenkyū-buntansha) |
NAGASHIMA Takeshi Osaka University, Institute of Laser Engineering, Assistant Professor (60332748)
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| Project Period (FY) |
2003 – 2007
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| Keywords | Terahertz wave / Terahertz time-domain spectroscopy / Magnetooptical effect / Photonic crystal / Metal hole array / Biomaterial / Protein / CW multimode laser diode |
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| Research Abstract |
The aim of this research is to apply the new techniques of terahertz spectroscopy and imaging which the present research group has developed to advanced measurements of materials, and to measurements of new materials and bio specimens, and to establish foundations for broad applications. The following results are obtained.
1. As to the development of THz sources, the 50 times enhancement of the radiation power from an InAs surface has been obtained by the attachment of an MgO hemispherical lens. It is found that the polarity of the THz emission waveform is reversed at around 5 T with increasing external magnetic field for n-InAs and, from this result it becomes clear that the conversion of the magnetoplasma modes to the radiation modes outside of the crystal is important in the emission process.
2. The THz magnetooptical measurement system has been developed with variable temperature and magnetic field ranges of 5-300 K and ±5T, respectively. It was applied to the measurements of cyclotron resonance of GaAs quantum wells and the magnetooptical effects of InAs and Si-doped GaAs. The THz- time-domain spectroscopic method has been applied to the electron spin resonance (ESR) for the first time.
3. Transmission spectra of two-dimensional dielectric sphere photonic crystals have been investigated. It is found that the feature of the band structure changes from the hopping-bike one of the confined modes to the waveguide-mode-like one of a dielectric slab with decreasing the dielectric constant Metal hole arrays with various structures have been investigated. They show a variety of transmission properties and the physical mechanisms of them are clarified.
4. Spectra of amino acids, peptide, and proteins, etc. are measured and the characteristics of them are clarified. Especially, it is demonstrated that the protein dynamics can be obtained from the THz spectra.
5. The performance of the compact and cheep THz spectrometer using CW multimode laser diodes is enhanced.
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[Journal Article] Application of partial least square on quantitative analysis of L-, D-, and DL-tartaric acid by terahertz absorption spectra2008
Author(s)
R.Nishikiori, M.Yamaguchi, K.Takano, T.Enatsu, M.Tani, U.Chandimal de Silva, N.Kawashita, T.Takagi, S.Morimoto, M.Hangyo, M.Kawase
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Journal Title
Chem.Pharm.Bull. 56(3)
Pages: 305-307
Description
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[Presentation] Propagation of terahertz waves in structured metals2008
Author(s)
M.Hangyo, K.Takano, F.Miyamaru, H.Miyazaki, M.Tani, T.Nagashima
Organizer
Joint Meeting of Study Groups on Quantum Electronics and Terahertz Electromagnetic Technology, "Physics of terahertz spectroscopy & imaging and terahertz devices"
Place of Presentation
Karizawa
Year and Date
20080110-20080112
Description
「研究成果報告書概要(欧文)」より
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[Presentation] テラヘルツメタマテリアル2007
Author(s)
萩行正憲
Organizer
理研シンポジウム「電磁メタマテリアル」
Place of Presentation
理化学研究所和光本所
Year and Date
20070511-20070512
Description
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[Presentation] Terahertz spectroscopy & imaging and biomaterials2007
Author(s)
M.Hangyo, M.Tani, T.Nagashima
Organizer
Laser Society of Japan, Tokyo Branch Seminar, 9th Advanced Laser Application Technology Seminar "Safe Society kept by terahertz electromagnetic waves"
Place of Presentation
Keio Univ.Yagami Campus
Year and Date
2007-11-07
Description
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[Presentation] テラヘルツ技術2006
Author(s)
萩行正憲
Organizer
レーザー夏の学校
Place of Presentation
宇治
Year and Date
20060923-20060924
Description
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[Presentation] Terahertz spectroscopy and surface waves2006
Author(s)
M.Hangyo, M.Tani, F.Miyamaru
Organizer
Annual Meeting of Japan Society of Applied Physics Symposium "New trend of spectrometric sensing of organic and bio molecules, Spectroscopy with terahertz waves and surface waves"
Place of Presentation
Musashi Kogyo Univ.
Year and Date
20060322-20060326
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Imaging by laser-excited THz pulses2005
Author(s)
M.Hanygo, M.Tani, H.Kitahara
Organizer
The 12th Int.Display Workshop in conj.With Asia Display 2005(IDW/AD'05)
Place of Presentation
Takamatsu, Japan
Year and Date
20051206-20051209
Description
「研究成果報告書概要(和文)」より
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[Presentation] Imaging by laser-excited THz pulses2005
Author(s)
M.Hanygo, M.Tani, H.Kitahara
Organizer
The 12th Int.Display Workshop in conj. With Asia Display 2005(IDW/AD '05)
Place of Presentation
Takamatsu, Japan
Year and Date
20051206-20051209
Description
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[Presentation] Study of biomolecular dynamics by terahertz time-domain spectroscopy2005
Author(s)
K.Yamamoto, M.Yamaguchi, M.Tani, M.Hangyo
Organizer
Annual Meeting of The biophysical Society of Japan, Symposium "New development of structure biology brought about by next-generation spectroscopies -Aiming at clarifying molecular functions from dynamical structures of biopolymers"
Place of Presentation
Sappolo
Year and Date
20051123-20051125
Description
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[Presentation] Photonic crystals viewed by terahertz time-domain spectroscopy2004
Author(s)
M.Hangyo, F.Miyamaru, M.Tanaka, M.Tani
Organizer
EIC Light and Microwave Workshop "Manifestation of new functions brought about by superfine periodic structures -Present status of and future development of microwave photonic crystals and metamaterials"
Place of Presentation
Sapporo
Year and Date
2004-07-22
Description
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[Book] Terahertz time-domain spectroscopy", pp.203-269 Terahertz Optoelectronics, ed.K.Sakai2005
Author(s)
S.Nishizawa, K.Sakai, M.Hangyo, T.Nagashima, M.Wada Takeda, K.Tominaga, A.Oka, K.Tanaka, O.Morikawa
Total Pages
67
Publisher
Springer, Berlin
Description
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