Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Takehiro Fukushima"'
Publikováno v:
AIP Advances, Vol 2, Iss 4, Pp 042112-042112-6 (2012)
We reveal the distinct wavelength dependence of not only the transmission power but also the phase change in double-layered metallic slit array systems with gradually modulated slit intervals, which are promising structures for achieving novel optica
Externí odkaz:
https://doaj.org/article/e5a9a83be32d48e38c557627d075fe9c
Autor:
Takehiro Fukushima
Publikováno v:
ICTON
In 1958, Roger Penrose proposed an interesting two-dimensional geometry (known as the Penrose unilluminable room) which always has dark regions unreachable by optical rays regardless of where a point light source is set within the cavity. In the pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc175e451a3bc420e600e624cc51164c
https://doi.org/10.1109/icton51198.2020.9203363
https://doi.org/10.1109/icton51198.2020.9203363
Autor:
Takehiro Fukushima
Publikováno v:
ICTON
Roger Penrose proposed an interesting cavity geometry, known as the Penrose unilluminable room, which always has unilluminable regions unreachable by optical rays wherever a point light source is set in the cavity. I studied resonance modes in microc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5705a93a7ee187ca0d448db9df75a0ee
https://doi.org/10.1109/icton.2019.8840033
https://doi.org/10.1109/icton.2019.8840033
Autor:
Takehiro Fukushima
Publikováno v:
2018 20th International Conference on Transparent Optical Networks (ICTON).
The morphological dependence of resonance modes in microstadium optical cavities was investigated numerically using the finite element method by changing the length of the straight segments, which connect two half-circles. Two mechanisms resulting in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cbf777313c73155dc0383f6da7be113
https://doi.org/10.1109/icton.2018.8473729
https://doi.org/10.1109/icton.2018.8473729
Approximation accuracy of Gaussian-optical approach applied to two-dimensional optical microcavities
Autor:
Takehiro Fukushima
Publikováno v:
ICTON
The Gaussian-optical approach is often used to obtain approximate solutions of stable periodic orbit resonances for two-dimensional optical microcavities of various cavity shapes. In this work, the accuracy of the approximate solutions is investigate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce20e0c39026d72e9e52b3a5c3013190
https://doi.org/10.1109/icton.2017.8025076
https://doi.org/10.1109/icton.2017.8025076
An asymmetric resonant cavity can be used to form a path that is much longer than the cavity size. We demonstrate this capability for a deformed microdisk equipped with two linear waveguides, by constructing a multiply reflected periodic orbit that i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac3236c8f9f52cf6afe7cbc9a42c7dfa
Publikováno v:
ECS Transactions. 62:215-222
Acoustic emission (AE) technique is nondestructive and sensitive method by detecting supersonic elastic waves to evaluate degradation of Li ion batteries. The AE technique was applied to a half cell (Li/ LiPF6 (EC: DMC)/ Sn or SnO) during charge and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f382297ba81fa5d58b6abbc68537c54
https://doi.org/10.1149/06201.0215ecst
https://doi.org/10.1149/06201.0215ecst
Autor:
Satoshi Sunada, Susumu Shinohara, Takehiro Fukushima, Takahisa Harayama, Kazuyuki Yoshimura, Kenichi Arai
Publikováno v:
Optical Review. 21:113-116
Time-domain properties of the output from quasistadium-shaped microcavity semiconductor lasers are studied. Ring modes generating a bidirectional output are selectively excited by partial pumping. We observe a high anticorrelation between the two bea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0111d2cd0f9c46d03ea00d8fc3367bd2
https://doi.org/10.1007/s10043-014-0018-9
https://doi.org/10.1007/s10043-014-0018-9
Publikováno v:
2016 18th International Conference on Transparent Optical Networks (ICTON).
This paper proposes a fast beam switching operation for a multi-electrode quasi-stadium laser diode using mode competition between the axial and diamond-shaped resonator modes. Numerical calculations based on rate equations revealed that a switching
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca9f96683239fb0ed05790aca850f286
https://doi.org/10.1109/icton.2016.7550532
https://doi.org/10.1109/icton.2016.7550532
Publikováno v:
Optical Review. 19:328-331
The quality factor of a laser diode beam tailored by Lloyd’s mirror interference was investigated numerically and experimentally. The far and near-field patterns were analyzed by numerical calculations based on Huygens’ integral. An almost circul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eadfd9488885729123128e25ea62071c
https://doi.org/10.1007/s10043-012-0050-6
https://doi.org/10.1007/s10043-012-0050-6