| Budget Amount *help |
¥43,940,000 (Direct Cost: ¥33,800,000、Indirect Cost: ¥10,140,000)
Fiscal Year 2022: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2021: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2020: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2019: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2018: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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| Outline of Final Research Achievements |
Structured light fields, such as optical vortex, carry an orbital angular momentum and an annular spatial form owing to their helical wavefronts. We investigated the photopolymerization with optical vortex illumination via single/two photon absorption. Interestingly, we have successfully fabricated a centimeter-scale self-written helical fiber by employing a non-diffraction visible optical vortex, e.g. a green higher order Bessel beam via both single and two photon absorption processes. Also, the fabricated helical fibers act as a mode convertor from a Gaussian mode to a vortex mode. Such fiber fabrication can be well understood by spatial soliton effects based on nonlinear Schrodinger equation.
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