Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Keiichirou Akiba"'
Autor:
Sotatsu Yanagimoto, Naoki Yamamoto, Tatsuro Yuge, Hikaru Saito, Keiichirou Akiba, Takumi Sannomiya
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-9 (2023)
Abstract Electron microscopy based on high-energy electrons allows nanoscopic analytical imaging taking advantage of secondarily generated particles. Especially for cathodoluminescence, the correlation between primary incident electrons and emitted p
Externí odkaz:
https://doaj.org/article/2aa0c651555e4398852c9a961461cb40
Autor:
Tetsuya Kubota, Sotatsu Yanagimoto, Hikaru Saito, Keiichirou Akiba, Ayumi Ishii, Takumi Sannomiya
Publikováno v:
Applied Physics Express, Vol 17, Iss 1, p 015005 (2024)
Highly efficient green emission of Cs _4 PbBr _6 has been attributed to intermediate states formed by embedded CsPbBr _3 nanocrystals or defects. However, direct experimental confirmation of the presence of such nano-emitters is not straightforward a
Externí odkaz:
https://doaj.org/article/d8e54d7ecad64cf29ad890b13bfc01af
We propose a theoretical model of a master equation for cathodoluminescence (CL). The master equation describes simultaneous excitation of multiple emitters by an incoming electron and radiative decay of individual emitters. We investigate the normal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5a29c2a74614425713b5ec640ce3688
Publikováno v:
Physical Review B. 103(issue 20)
We measured the second-order correlation function of the cathodoluminescence intensity and investigated the Purcell effect by comparing the lifetimes of quantum emitters with and without metal structure. The increase in the electromagnetic local dens
Cathodoluminescence of green fluorescent protein exhibits the redshifted spectrum and the robustness
Publikováno v:
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Green fluorescent protein (GFP) and its variants are an essential tool for visualizing functional units in biomaterials. This is achieved by the fascinating optical properties of them. Here, we report novel optical properties of enhanced GFP (EGFP),
Publikováno v:
Physical Review B. 94
We observe nuclear magnetic resonance (NMR) in the fractional quantum Hall regime at the Landau-level filling factor of $\ensuremath{\nu}=2/3$ from simultaneous measurement of longitudinal resistance and photoluminescence (PL). The dynamic nuclear-sp
Publikováno v:
Optics Communications. 259:789-792
The frequency spectrum of the fluorescence must be reduced when studying interactions between atoms and parametric fluorescence using the photon counting method since photon counting does not distinguish the light frequency. An interference filter an
Storage and retrieval of parametric down-conversion (PDC) photons are demonstrated with electromagnetically induced transparency (EIT). Extreme frequency filtering is performed for THz order of broadband PDC light and the frequency bandwidth of the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f4aff697439e350d5c786c45831c343
http://arxiv.org/abs/0711.3377
http://arxiv.org/abs/0711.3377
Autor:
Takahito Tanimura, Satoshi Nagatsuka, Kazuhito Honda, Manabu Arikawa, Yoshihiko Yokoi, Mikio Kozuma, Akira Furusawa, Daisuke Akamatsu, Keiichirou Akiba
Publikováno v:
Physical review letters. 100(9)
Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. 930ns of the squeezed vacuum pulse was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state.
Autor:
Keiichirou Akiba, Yoshihiko Yokoi, Akira Furusawa, Daisuke Akamatsu, Kazuhito Honda, Satoshi Nagatsuka, Mikio Kozuma, Manabu Arikawa
A probe light in a squeezed vacuum state was injected into cold 87 $Rb atoms with an intense control light in a coherent state. A sub-MHz window was created due to electromagnetically induced transparency, and the incident squeezed vacuum could pass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac2093327aa5acb11329b8a5141e22f2
http://arxiv.org/abs/0707.1971
http://arxiv.org/abs/0707.1971