Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Sakurai Atsunori"'
Vibrational sum frequency generation (SFG) is a nonlinear spectroscopic technique widely used to study the molecular structure and dynamics of surface systems. However, the spatial resolution achieved by far-field observations is constrained by the d
Externí odkaz:
http://arxiv.org/abs/2411.18909
Publikováno v:
EPJ Web of Conferences, Vol 205, p 03002 (2019)
We demonstrate surface-enhanced ultrafast vibrational spectroscopy employing periodic arrays of infrared-resonant gold nanoantennas. The antenna-enhancements of molecular vibrational responses are analytically formulated with a simple coupled-dipole
Externí odkaz:
https://doaj.org/article/99c75a78d1814d308150315460d3ec04
Publikováno v:
EPJ Web of Conferences, Vol 205, p 04024 (2019)
We performed pump-probe spectroscopy on OD stretching mode in KTaO3 to explore how a proton/deuteron interacts with the surroundings. We identified the potential anharmonicity and phonon modes which interact with a proton/deuteron, considering the te
Externí odkaz:
https://doaj.org/article/db94b47159f34decab617fa036d14a22
Autor:
Karki, Khadga J., Chen, Junsheng, Sakurai, Atsunori, Shi, Qi, Gardiner, Alastair T., Kühn, Oliver, Cogdell, Richard J., Pullerits, Tönu
Electronic 2D spectroscopy allows nontrivial quantum effects in chemistry and biology to be explored in unprecedented detail. Here, we apply recently developed fluorescence detected coherent 2D spectroscopy to study the light harvesting antenna 2 (LH
Externí odkaz:
http://arxiv.org/abs/1804.04840
Autor:
Jin, Aohan, Fu, Siyuan, Sakurai, Atsunori, Liu, Liang, Edman, Fredrik, Öwall, Viktor, Pullerits, Tonu, Karki, Khadga J.
Generalized lock-in amplifiers use digital cavities with Q-factors as high as 5X10^8. In this letter, we show that generalized lock-in amplifiers can be used to analyze microwave (giga-hertz) signals with a precision of few tens of hertz. We propose
Externí odkaz:
http://arxiv.org/abs/1405.0853
Autor:
Fu, Siyuan, Sakurai, Atsunori, Liu, Liang, Edman, Fredrik, Pullerits, Tõnu, Öwall, Viktor, Karki, Khadga
We herein formulate the concept of a generalized lock-in amplifier for the precision measurement of high frequency signals based on digital cavities. Accurate measurement of signals higher than 200 MHz using the generalized lock-in is demonstrated. T
Externí odkaz:
http://arxiv.org/abs/1308.5512
Autor:
Sakurai, Atsunori, Tanimura, Yoshitaka
Publikováno v:
New J. Phys. 16 (2014) 015002
The quantum dissipative dynamics of a tunneling process through double barrier structures is investigated on the basis of non-perturbative and non-Markovian treatment. We employ a Caldeira-Leggett Hamiltonian with an effective potential calculated se
Externí odkaz:
http://arxiv.org/abs/1304.5596
Autor:
Sakurai, Atsunori, Tanimura, Yoshitaka
Publikováno v:
J. Phys. Soc. Jpn. 82, 033707 (2013)
The quantum dissipative dynamics of a tunneling process through double barrier structures is investigated on the basis of a rigorous treatment for the first time. We employ a Caldeira-Leggett Hamiltonian with an effective potential calculated self-co
Externí odkaz:
http://arxiv.org/abs/1302.1076
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