Zobrazeno 1 - 10
of 537
pro vyhledávání: '"Ohta, Ryuichi"'
Publikováno v:
Phys. Rev. A, 109 (2), 023706 (2024)
Spectrally and spatially varying ensembles of emitters embedded into waveguides are ever-present in both well-established and emerging technologies. If control of collective excitations can be attained, a plethora of coherent quantum dynamics and app
Externí odkaz:
http://arxiv.org/abs/2309.02622
Autor:
Ohta, Ryuichi, Lelu, Gregoire, Xu, Xuejun, Inaba, Tomohiro, Hitachi, Kenichi, Taniyasu, Yoshitaka, Sanada, Haruki, Ishizawa, Atsushi, Tawara, Takehiko, Oguri, Katsuya, Yamaguchi, Hiroshi, Okamoto, Hajime
Publikováno v:
Phys. Rev. Lett. 132, 036904 (2024)
Acoustically induced dressed states of long-lived erbium ions in a crystal are demonstrated. These states are formed by rapid modulation of two-level systems via strain induced by surface acoustic waves whose frequencies exceed the optical linewidth
Externí odkaz:
http://arxiv.org/abs/2302.00327
Autor:
Kurosu, Megumi, Hatanaka, Daiki, Ohta, Ryuichi, Yamaguchi, Hiroshi, Taniyasu, Yoshitaka, Okamoto, Hajime
A high-overtone bulk acoustic resonator (HBAR), in which a piezoelectric transducer is set on an acoustic cavity, has been attracting attention in both fundamental research and RF applications due to its scalability, high frequency, and high quality
Externí odkaz:
http://arxiv.org/abs/2212.05768
Autor:
Ohta, Ryuichi1 (AUTHOR) ryuichiohta0120@gmail.com, Nitta, Tachiko1 (AUTHOR), Shimizu, Akiko1 (AUTHOR), Sano, Chiaki2 (AUTHOR)
Publikováno v:
BMC Primary Care. 4/19/2024, Vol. 25 Issue 1, p1-11. 11p.
Autor:
Amano, Shiho1,2 (AUTHOR) sanochi@med.shimane-u.ac.jp, Ohta, Ryuichi1 (AUTHOR), Sano, Chiaki2 (AUTHOR)
Publikováno v:
Journal of Clinical Medicine. Jan2024, Vol. 13 Issue 2, p539. 8p.
Autor:
Ohta, Ryuichi1 (AUTHOR) ryuichiohta0120@gmail.com, Yakabe, Toshihiro1 (AUTHOR), Sano, Chiaki2 (AUTHOR)
Publikováno v:
BMC Primary Care. 1/12/2024, Vol. 25 Issue 1, p1-9. 9p.
Autor:
Ohta, Ryuichi, Herpin, Loïc, Bastidas, Victor M., Tawara, Takehiko, Yamaguchi, Hiroshi, Okamoto, Hajime
Publikováno v:
Phys. Rev. Lett. 126, 047404 (2021)
Strain-mediated interaction between phonons and telecom photons is demonstrated using excited states of erbium ions embedded in a mechanical resonator. Owing to the extremely long-lived nature of rare-earth ions, the dissipation rate of the optical r
Externí odkaz:
http://arxiv.org/abs/2006.14133
Autor:
Asano, Motoki, Ohta, Ryuichi, Aihara, Takuma, Tsuchizawa, Tai, Okamoto, Hajime, Yamaguchi, Hiroshi
Publikováno v:
Phys. Rev. A 100, 053801 (2019)
We report an observation of phononic Schwinger angular momenta, which fully represent twomode states in a micromechanical resonator. This observation is based on simultaneous optical detection of the mechanical response at the sum and difference freq
Externí odkaz:
http://arxiv.org/abs/1905.12178
Publikováno v:
Phys. Rev. B 99, 115315 (2019)
We demonstrate mechanical modulations of the exciton lifetime by using vibrational strain of a gallium arsenide (GaAs) resonator. The strain-induced modulations have anisotropic dependences on the crystal orientation, which reveals the origin of thes
Externí odkaz:
http://arxiv.org/abs/1901.05193
A MEMS Duffing resonator is driven by two adjacent frequency tones into the nonlinear regime. We show that if the two-tone drive is applied at a frequency where a bistable response of the nonlinear oscillator exists, then the system output will be mo
Externí odkaz:
http://arxiv.org/abs/1812.04161