| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
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| Outline of Final Research Achievements |
A circularly polarized photon has angular momentum, and pseudoangular momentum (angular momentum defined by motion of only discrete angles) is conserved in the interaction with two-dimensional materials with rotational symmetry. In resonance Raman spectroscopy, when the incident and scattered light are circularly polarized, there is Raman scattering in which the helicity (±hbar) of the circularly polarized light does not change and Raman scattering in which the sign reverses. In this study, we theoretically analyzed this phenomenon and clarified (1) the relation between the sign of helicity in Raman scattering from the law of conservation of angular momentum. (2) From the equation of the Raman tensor, we showed that the phenomenon can be explained by a system even without rotational symmetry. (3) Furthermore, we developed a program to calculate the circularly polarized, resonant Raman intensity from first-principles calculations.
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