Research
Keywords
- Nonlinear Optical Phenomena
- Raman Scattering
- Femtosecond Pump-Probe Spectroscopy
- Terahertz Time-Domain Spectroscopy
Subject
- Research of hydrogen-bonding liquid by terahertz time-domain spectroscopy
- Research of electron lattice interaction by coherent phonon
- Research of carrier dynamics in semiconductor
Outline
We investigate the properties of materials using laser light as a probe. Recently, we are particularly interested in semiconductor nanoparticles of a few nanometer size. Semiconductor nanoparticles are the subject of the 2023 Nobel Prize in Chemistry and can produce large quantum mechanical effects by confining electrons in extremely small semiconductors. These quantum effects are expected to lead to applications such as quantum computing and quantum communication.
We are currently studying the energy dynamics inside nanoparticles and the fine energy structure of excited states by measuring the time-resolved luminescence, and we also deliberately create electron-rich states inside the nanoparticle to study the interactions between electrons in strongly confined situation.
Recent Highlights
- “Optical properties of ZnO nanocrystals under photo-induced electron doping” Sekika Yamamoto and Tenta Ushida,
J. Appl. Phys. 136, 064302 (2024).(DOI: 10.1063/5.0219897) - “Size dependence of luminescence decay process in CsPbBr3 nanocrystals”
Yura Suzuki and Sekika Yamamoto,
J. Appl. Phys. 135, 083107 (2024).(DOI: 10.1063/5.0190753)
Staff
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YAMAMOTO SekikaAssistant ProfessorEmailsekika(at)phys.sci.hokudai.ac.jpOffice5-01-22
Contact
ZIP Code 060-0810
Address Kita 10, Nisi 8, Kita-ku, Sapporo 060-0810, JAPAN
TEL +81(JPN)-11-706-3551