Profile Information
- Affiliation
- Professor, Faculty of Science, Department of Physics, Gakushuin University
- Degree
- (BLANK)(The University of Tokyo)
- Contact information
- takuya.hirano
gakushuin.ac.jp - J-GLOBAL ID
- 200901062696389245
- researchmap Member ID
- 1000246127
- External link
Research Interests
5Research Areas
2Research History
7-
Apr, 2022 - Mar, 2025
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Apr, 2017 - Mar, 2021
Education
4Committee Memberships
17-
2019 - Present
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Nov, 2000 - Present
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Apr, 2000 - Present
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Apr, 2022 - Mar, 2023
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Jun, 2020 - Jun, 2022
Awards
1-
2022
Papers
101-
Physical Review A, May 11, 2023
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Optics Continuum, Apr 15, 2023
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Optics Express, 30(15) 26120-26120, Jul 18, 2022 Peer-reviewedWe report on the waveguide-based generation of pulsed squeezed light at 795 nm, suitable for quantum enhanced measurements with rubidium atoms. Pulsed ultraviolet second harmonic light with a power of more than 400 mW is produced using a periodically poled LiNbO3 (PPLN) waveguide and is injected into another PPLN waveguide to generate quadrature squeezing. We find that the phase of the second harmonic pulse is shifted within a pulse, and we attribute the shift to heating due to blue-light induced infrared absorption (BLIIRA) from a comparison between the experiment and a numerical simulation. A squeezing level of −1.5(1) dB is observed in homodyne detection when we apply a linear phase shift to the local oscillator. The experiment and simulation imply that the squeezing level can be further improved by reducing BLIIRA.
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Physical Review A, 104(4), Oct 28, 2021 Peer-reviewed
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Japanese Journal of Applied Physics, 60(5), May, 2021 Peer-reviewed
Misc.
239-
Meeting Abstracts of the Physical Society of Japan, 71 511-511, 2016<p>我々は以前からスピン2ボース・アインシュタイン凝縮体のスピン制御技術を利用して、ラムゼイ干渉によりラーモア歳差運動の観測をしてきた。これまでは、初期状態が磁気副準位m_F_=2の状態で実験を行ってきたが、初期状態を適切に選ぶことで干渉計の感度を向上させることが予測されている。本発表ではm_F_=0を初期状態にした時のラジオ波によるスピンの回転とラムゼイ干渉について報告する。</p>
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Meeting Abstracts of the Physical Society of Japan, 71 505-505, 2016<p>多成分流体の空間的な構造形成は、非平衡過程や非線型現象を理解する上で重要な効果である。我々は、2成分ボース・アインシュタイン凝縮体の混和性を制御することにより、不安定な空間構造を持つ混ざり合う性質の2成分凝縮体を生成し、パターン形成ダイナミクスを観測することに成功した。発表では、混和性制御の方法や実験結果の詳細について紹介する。</p>
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Meeting Abstracts of the Physical Society of Japan, 71 746-746, 2016
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Meeting Abstracts of the Physical Society of Japan, 71 632-632, 2016
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Meeting Abstracts of the Physical Society of Japan, 71 1680-1681, 2016
Books and Other Publications
8Professional Memberships
3Works
8Research Projects
30-
科学研究費助成事業, 日本学術振興会, Apr, 2019 - Mar, 2023
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2018 - Mar, 2023
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2013 - Mar, 2018
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2013 - Mar, 2018