2012 Fiscal Year Final Research Report
Novel optical physics by using ultrashort annular optical beams interacting with ring-shaped materials
| Project/Area Number |
23656040
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
MORITA Ryuji 北海道大学, 大学院・工学研究院, 教授 (30222350)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 光量子科学 / 量子エレクトロニクス / 高性能レーザー / モノサイクル光パルス / 環状ビーム / 位相特異性 / 偏光特異性 |
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| Research Abstract |
Few-cycle optical vortex pulses were first generated by optical parametric amplification and chirp compensation. In addition, topological-charge-programmable ultrashort optical-vortex pulse generation was demonstrated. Measurement method of orbital angular momentum (OAM) spectra with high precision, time-resolved nonlinear spectroscopy technique using optical vortices as a pump and a probe, nonlinear OAM conversion method with high accuracy were developed. Furthermore, chiral nano-needles of metal were first fabricated by using spin-controlled optical-vortex pulses.
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