Zobrazeno 1 - 10
of 265
pro vyhledávání: '"Hase Muneaki"'
Publikováno v:
Nature Commun. 15, 7174 (2024)
Polarons can control carrier mobility and can also be used in the design of quantum devices. Although much effort has been directed into investigating the nature of polarons, observation of defect-related polarons is challenging due to electron-defec
Externí odkaz:
http://arxiv.org/abs/2409.06144
We investigate the ultrafast spin dynamics of the prototypical topological insulator $\mathrm{Bi_{2}Se_{3}}$ using time-resolved Kerr-rotation (polarization-change) measurements across near-infrared wavelengths. The Kerr-rotation angle $\Delta \theta
Externí odkaz:
http://arxiv.org/abs/2405.12869
We investigate the ultrafast lattice dynamics in ${1T-TiSe_2}$ using femtosecond reflection pump-probe and pump-pump-probe techniques at room temperature. The time-domain signals and Fourier-transformed spectra show the $A_{1g}$ phonon mode at 5.9 TH
Externí odkaz:
http://arxiv.org/abs/2306.05777
Autor:
Afalla, Jessica, Muldera, Joselito, Takamizawa, Semmi, Fukuda, Takumi, Ueno, Keiji, Tani, Masahiko, Hase, Muneaki
Publikováno v:
J. Appl. Phys. 133, 165103 (2023)
Terahertz (THz) time-domain emission spectroscopy was performed on layered 2H-MoSe2 and 2H-WSe2. The THz emission shows an initial cycle attributed to surge currents and is followed by oscillations attributed to coherent interlayer phonon modes. To o
Externí odkaz:
http://arxiv.org/abs/2305.18805
Autor:
Abulikemu, Aizitiaili, Hase, Muneaki
Publikováno v:
Optical Materials Express Vol. 13, pp. 916-924 (2023)
We report on a direct generation of efficient and wavelength-tunable third-harmonic generation (THG) from ultrapure electronic-grade (EG) diamond crystals. Under an ultrafast infrared excitation at 1280 nm, the considerably high optical conversion ef
Externí odkaz:
http://arxiv.org/abs/2304.04345
Publikováno v:
Phys. Rev. Applied 19, 024054 (2023)
In this work, we systematically investigated the ultrafast optical properties of aluminum (Al) thin films on silicon cantilevers using a microscopic femtosecond optical pump-probe technique to explore the effect of light irradiation upon cantilevers
Externí odkaz:
http://arxiv.org/abs/2304.04337
Autor:
Nakayama Tomohito, Yoshizawa Shunsuke, Hirano Atsushi, Tanaka Takeshi, Shiraki Kentaro, Hase Muneaki
Publikováno v:
EPJ Web of Conferences, Vol 205, p 05009 (2019)
Carbon nanotube (CNT) and protein complexes are one of the most important nanomaterials in physical and biological fields, especially for building biomedical systems based on their unique electronic and optical properties. However, there is little kn
Externí odkaz:
https://doaj.org/article/bbb80b0af1264c3db6ba16e821f883f3
Autor:
Mondal Richarj, Arai Akira, Saito Yuta, Fons Paul, Kolobov Alexander V., Tominaga Junji, Hase Muneaki
Publikováno v:
EPJ Web of Conferences, Vol 205, p 04021 (2019)
We report upon observation of a transient Fano resonance, a quantum interference between coherent phonon and Dirac plasmons, that persisted for up to 1 picosecond in the topological insulator Sb2Te3 investigated using coherent phonon spectroscopy.
Externí odkaz:
https://doaj.org/article/f59e6000b2db420d86e40ea0977518fb
Publikováno v:
Applied Physics Express Vol. 15, 092005 (2022)
This study investigates the ultrafast dynamics of coherent phonons and phonon-polaritons in lithium niobate (LiNbO$_{3}$) crystals using reflective pump-probe spectroscopy with 25-fs time resolution. In addition to several coherent optical phonon mod
Externí odkaz:
http://arxiv.org/abs/2208.10036
Publikováno v:
APL Photonics, 7, 066105 (2022)
The current generation of quantum sensing technologies using color centers in diamond crystals is primarily based on the principle that the resonant microwave frequency of the luminescence between quantum levels of the nitrogen-vacancy (NV) center va
Externí odkaz:
http://arxiv.org/abs/2206.09077