大学院工学研究院
基本情報
学歴
3-
2002年4月 - 2006年3月
受賞
15-
2019年1月
論文
298-
Optics Express 33(3) 4700-4700 2025年1月29日Electrons confined in quantum-disk structures exhibit an intrinsic spin vortex state with spin angular momentum (SAM) and orbital angular momentum (OAM) [Phys. Rev. B 79(15), 155450 (2009)10.1103/PhysRevB.79.155450]. A higher-order electron state, which is a SAM – OAM entangled state expressed by superposition of spin–vortex states, has a spatial spin structure and can be represented as a higher-order Bloch vector on a higher-order Bloch sphere [Optica Quantum 2(4), 245 (2024)10.1364/OPTICAQ.527615]. In this study, we analyzed the Rabi oscillation of higher-order electron states in a quantum disk structure driven by higher-order photons possessing both SAM and OAM, with the aim of manipulating SAM – OAM entangled electron states. The higher-order Bloch vector precesses about the Stokes vector of the higher-order photon-driven field, and its precession behavior can be controlled by the state of the driving photon field, pulse width, and intensity. These results will lead to the realization of high-dimensional quantum computations and high-dimensional quantum interfaces using SAM and OAM of electrons and photons.
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IEEE Access 13 9343-9353 2025年
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Rapid calculation of computer-generated holograms for line-drawn 3D objects with varying thicknessesOptics and Lasers in Engineering 181 108359-108359 2024年10月
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Holography, Diffractive Optics, and Applications XIII 2023年11月27日
MISC
298-
Optics & Photonics Japan講演予稿集(CD-ROM) 2023 2023年
講演・口頭発表等
71-
23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 2018年1月1日copyright © 2016 Society of Information Display. All rights reserved. We propose high-speed computer-generated hologram reproduction using digital mirror device for high-definition spatiotemporal division multiplexing electro-holography. Finally, we succeeded to play high-definition 3-D movie of 3-D object comprised about 900,000 points at 60 fps when each frame was divided into twelve.
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23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 2018年1月1日
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Proceedings of SPIE - The International Society for Optical Engineering 2018年1月1日© 2018 SPIE. To further accelerate the calculations associated with point-cloud-based holograms, wavelet shrinkage-based superpositIon (WASABI) has been proposed. Wavelet shrinkage eliminates the small wavelet coecient values of the light distribution emitted from a point cloud, resulting in an approximated light distribution calculated from a few representative wavelet coecients. Although WASABI can accelerate the hologram calculations, the approximated light distribution tends to lose the high-frequency components. To address this issue, random sampling was applied to the light distribution.
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23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 2018年1月1日copyright © 2016 Society of Information Display. All rights reserved. The combination of the random phase-free method and Gerchberg-Saxton (GS) algorithm succeeded in improving the image quality of holograms. However, the GS algorithm takes a long computation time. In this research, we propose faster methods for the image quality improvement of the random phase-free hologram.
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23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 2018年1月1日copyright © 2016 Society of Information Display. All rights reserved. We accelerated hologram generation based on raysampling plane by a graphics processing unit (GP U). The computational time by a central processing unit (CPU) was 56.02 seconds, while that by a GPU was 0.3764 seconds. We achieved to generate a 3072×3072-pixels hologram by the GPU approximately 150 times faster than the CPU.
共同研究・競争的資金等の研究課題
11-
新エネルギー・産業技術総合開発機構 官民による若手研究者発掘支援事業 2023年9月 - 2025年9月
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日本学術振興会 科学研究費助成事業 2023年4月 - 2025年3月
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日本学術振興会 科学研究費助成事業 2020年11月 - 2025年3月
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日本学術振興会 科学研究費助成事業 2019年4月 - 2024年3月
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日本学術振興会 科学研究費助成事業 2019年4月 - 2021年3月