| Project/Area Number |
11554023
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Physical chemistry
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| Research Institution | Saitama University |
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Principal Investigator |
TASUMI Mitsuo Saitama Univ., Fac. Sci., Professor, 理学部, 教授 (60011540)
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| Co-Investigator(Kenkyū-buntansha) |
YOKOYAMA Tohru BIORAD Labs., Japan, Division Vice Manager, ラッド ラボラトリーズ(株)・分析機器事業部, 次長(研究職)
SAKAMOTO Akira Saitama Univ., Fac. Sci., Lecturer, 理学部, 講師 (90262146)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥3,700,000 (Direct Cost: ¥3,700,000)
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| Keywords | Picosecond time-resolved Raman spectroscopy / Tunable near-infrared light / Fourier-transform Raman spectrometer / Conducting polymers / Fluorescent molecules |
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| Research Abstract |
A picosecond time-resolved Raman spectrometer was constructed for the purpose of measuring picosecond time-resolved Raman spectra from various fluorescent molecules and conducting polymers.
Wavelength-tunable near-infrared light pulses are obtained as the signal output (wavelength region : 1060-1350 nm) from an optical parametric generator/amplifier (OPG/A) excited with the fundamental output from a picosecond Ti-sapphire regenerative amplifier coupled with the output from a mode-locked Er-doped fiber laser. The near-infrared light pulses thus obtained are used as the probe light for measuring the Raman spectra. A step-scan Fourier-transform (FT) Raman spectrometer is employed for measuring the Raman scattering. The Raman scattering is introduced into the step-scan FT Raman spectrometer. The interference signal from the detector is processed with a box-car integrator and an A/D converter to obtain a Raman spectrum.
When the second harmonic (wavelength region : 775-870 nm) of the idler output from an OPG/A is used as the probe light, the Raman scattering is analyzed with a dispersive spectrometer equipped with a CCD detector.
Transient species are generated by irradiating either the second harmonic (388 nm) or third harmonic (258 nm) of the output from the Ti-sapphire regenerative amplifier as the pump light. The time-resolved Raman spectrum from the transient species is obtained by the probe pulse with a delay time from the pump pulse.
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