Zobrazeno 1 - 10
of 374
pro vyhledávání: '"Okamoto Hajime"'
Raman-gain-enhanced near-field optomechanical transduction between a movable optical cavity and SiN-membrane resonator is demonstrated. The Raman gain compensates for the intrinsic loss of the cavity and amplifies the optomechanical transduction, thr
Externí odkaz:
http://arxiv.org/abs/2402.08179
Cavity optomechanical devices can be made to have good compatibility with optical fiber technology by utilizing fiber-based waveguides and cavities and can be used in high-performance optical sensor applications. Such optomechanical microsensors have
Externí odkaz:
http://arxiv.org/abs/2401.12529
We demonstrate a fiber-type optomechanical array consisting of elastically interconnected silica microbottle resonators with high-Q optical and mechanical modes. In total, fifty optomechanical resonators fabricated by fine glass processing are unifor
Externí odkaz:
http://arxiv.org/abs/2310.10055
Autor:
Hatanaka, Daiki, Takeshita, Hiroaki, Kataoka, Motoki, Okamoto, Hajime, Tsuruta, Kenji, Yamaguchi, Hiroshi
Publikováno v:
Nano Letters, 24, 5570-5577 (2024)
Topological phononics enabling backscattering-immune transport is expected to improve the performance of electromechanical systems for classical and quantum information technologies. Nonetheless, most of the previous demonstrations utilized macroscal
Externí odkaz:
http://arxiv.org/abs/2310.04008
Autor:
Okamoto Hajime, Sato Kaori, Fujikawa Masahiro, Oikawa Eiji, Nishizawa Tomoaki, Ishii Shoken, Jin Yoshitaka, Aoki Makoto, Sugimoto Nobuo
Publikováno v:
EPJ Web of Conferences, Vol 237, p 07011 (2020)
We develop the synergetic ground-based active-sensor-system for the evaluation of observations by space-borne lidars. The system consists of second version of multi-field-view multiple-scattering polarization lidar (MFMSPL-2), multiple-field-of-view
Externí odkaz:
https://doaj.org/article/e346bfd440bf457d960f00cdb94b799f
Autor:
Ishii Shoken, Aoki Makoto, Tominaga Kanna, Nishizawa Tomoaki, Jin Yoshitaka, Sugimoto Nobuo, Shibata Yasukuni, Sato Atsushi, Sato Kaori, Okamoto Hajime
Publikováno v:
EPJ Web of Conferences, Vol 237, p 06006 (2020)
Wind is fundamental in many atmospheric phenomena. Global wind profile observation is important to improve numerical weather prediction (NWP) and various meteorological studies. Wind profile observations are measured mainly by radiosonde networks. A
Externí odkaz:
https://doaj.org/article/01db97fe28a84141857a0bbff4ccf4c6
Autor:
Nishizawa Tomoaki, Jin Yoshitaka, Sugimoto Nobuo, Okamoto Hajime, Fujikawa Masahiro, Ishii Shoken
Publikováno v:
EPJ Web of Conferences, Vol 237, p 07009 (2020)
We developed a multiple-filed-of view multiple-scattering polarization lidar (MFMSPL) at 355nm to study microphysics of optically thick clouds and understand multiple scattering effects on space lidar measurements (e.g., EarthCARE). This system is ba
Externí odkaz:
https://doaj.org/article/8c016bb3c8fd4f5a88429d6979e76d82
Publikováno v:
EPJ Web of Conferences, Vol 237, p 02023 (2020)
We developed an algorithm to derive extinction coefficients for four aerosol components (water-soluble, dust, sea salt, black carbon) from Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) data. The algorithm was applied to the nine-year data
Externí odkaz:
https://doaj.org/article/e7b90417ed93442ca91dd541cb34b68c
Sub-femtogram resolution of an in-liquid cavity optomechanical mass sensor based on the twin-microbottle glass resonator is demonstrated. An evaluation of the frequency stability using an optomechanical phase-locked loop reveals that this cavity opto
Externí odkaz:
http://arxiv.org/abs/2302.01467
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