Zobrazeno 1 - 10
of 301
pro vyhledávání: '"Nakamura, Kazutaka G."'
We present a novel and simple picture of the generation dynamics of coherent longitudinal optical (LO) phonons and LO-phonon-plasmon-coupled (LOPC) modes by the ultrafast infrared pump-pulses in gallium arsenide (GaAs) employing the low-temperature a
Externí odkaz:
http://arxiv.org/abs/2405.07159
Autor:
Han, Yadong, Yu, Junhong, Zhang, Hang, Xu, Fang, Peng, Kunlin, Zhou, Xiaoyuan, Qiao, Liang, Misochko, Oleg V., Nakamura, Kazutaka G., Vanacore, Giovanni M., Hu, Jianbo
Publikováno v:
J. Phys. Chem. Lett. 2022, 13, 442
Layered tin selenide (SnSe) has recently emerged as a high-performance thermoelectric material with the current record for the figure of merit (ZT) observed in the high-temperature Cmcm phase. So far, access of the Cmcm phase has been mainly obtained
Externí odkaz:
http://arxiv.org/abs/2107.01576
Autor:
Kimata, Tetsuya, Yoda, Kazuma, Matsumoto, Hana, Tanabe, Hiroyuki, Minami, Fujio, Kayanuma, Yosuke, Nakamura, Kazutaka G.
Publikováno v:
Phys. Rev. B 101, 174301 (2020)
Coherent control is an optical technique to manipulate quantum states of matter. The coherent control of 40-THz optical phonons in diamond was demonstrated by using a pair of sub-10-fs optical pulses. The optical phonons were detected via transient t
Externí odkaz:
http://arxiv.org/abs/1912.12402
Publikováno v:
In Solid State Communications 1-15 November 2023 373-374
Autor:
Nakamura, Kazutaka G., Yokota, Kensuke, Okuda, Yuki, Kase, Rintaro, Kitashima, Takashi, Mishima, Yu, Shikano, Yutaka, Kayanuma, Yosuke
Publikováno v:
Phys. Rev. B 99, 180301(R) (2019)
Optical dual-pulse pumping actively creates quantum-mechanical superposition of the electronic and phononic states in a bulk solid. We here made transient reflectivity measurements in an n-GaAs using a pair of relative-phase-locked femtosecond pulses
Externí odkaz:
http://arxiv.org/abs/1905.08362
Autor:
Furusho, Yuya, Yagi, Ryoko, Suda, Masaki, Maruhashi, Tsukasa, Takagi, Itsuki, Kayanuma, Yosuke, Minami, Fujio, Nakamura, Kazutaka G.
Publikováno v:
In Solid State Communications 1 February 2023 360
Autor:
Takagi, Itsuki, Nakamura, Kazutaka G.
Publikováno v:
In Solid State Communications 1 February 2023 360
The coupling between longitudinal optical (LO) phonons and plasmons plays a fundamental role in determining the performance of doped semiconductor devices. In this work, we report a comparative investigation into the dependence of the coupling on tem
Externí odkaz:
http://arxiv.org/abs/1804.05221
Fully symmetric A1g phonons are expected to play a dominant role in electron scattering in strong topological insulators (TIs), thus limiting the ballistic transport of future electronic devices. Here, we report on femtosecond time-resolved observati
Externí odkaz:
http://arxiv.org/abs/1801.02551
Autor:
Sasaki, Hiroya, Tanaka, Riho, Okano, Yasuaki, Minami, Fujio, Kayanuma, Yosuke, Shikano, Yutaka, Nakamura, Kazutaka G.
Publikováno v:
Sci. Rep. 8, 9609 (2018)
The coherent control of optical phonons has been experimentally demonstrated in various physical systems. While the transient dynamics for optical phonons can be explained by phenomenological models, the coherent control experiment cannot be explaine
Externí odkaz:
http://arxiv.org/abs/1712.07337