2005 Fiscal Year Final Research Report Summary
Ultra-short pulse generation and its interaction with matter
| Project/Area Number |
14002003
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| Research Category |
Grant-in-Aid for Specially Promoted Research
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| Allocation Type | Single-year Grants |
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| Review Section |
Physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KOBAYASHI Takayoshi The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (60087509)
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| Co-Investigator(Kenkyū-buntansha) |
YABUSHITA Atsushi The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 助手 (20376536)
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| Project Period (FY) |
2002 – 2005
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| Keywords | Non-collinear optical parametric amplification (NOPA) / Carrier envelope phase (CEP) / Absolute phase / Visible-infrared region / Transient-state spectroscopy / Real-time vibrational spectroscopy / Photonic crystal fiber / Quantum interference control |
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| Research Abstract |
(1) Generation of ultra-short pulse: Carrier envelope phase (CEP) selfstabilization of the NOPA output pulse was evaluated with the photonic crystal fiber, and its stability was confirmed. inter-stabilization of outputs of two NOPA systems was also evaluated by means of spectral interference. Anew spectroscopy system for pump-probe measurement with two NOPA systems was constructed.
(2) Development of ultra-short pulse characterization method: CEP of the ultra-short pulse was measured. Conventional method of CEP measurement is limited on the use of extremely intense laser field. A newly developed method has enabled us to measure the CEP of pulse with arbitrary intensity. Ultra-short pulse with a fixed CEP was generated by means of OPA, and fluctuation was stabilized successfully asmuch as π/10. Using the CEP-controlled laser system, a CEP optical poling experiment was established. Induced molecular orientation was shown to be controlled by the CEP, which was consistent with theoretical prediction.
(3) Transient-state spectroscopy (Real-time spectroscopy of molecular vibration): Real-time dynamics of vibronic coupling of molecular system, such as polydiacetylene, one-dimensional system of conjugated polyene, isocyanine J-aggregate, phthalocyanine, porphyrin and its metallic compound, was established.
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Research Products
(15 results)
