Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Hiroshi Ono"'
Autor:
Hiroshi Ono, Yukitoshi Hattori, Tomoyuki Sasaki, Takeya Sakai, Nobuhiro Kawatsuki, Ryusei Momosaki, Kazunari Ashikawa, Moritsugu Sakamoto, Yoshichika Tanaka, Koya Yamada, Kohei Noda
Publikováno v:
Applied optics. 60(23)
In this paper, geometric-phase lenses, which can not only correct wavefront aberrations but also magnify an aerial image, have been proposed for use in an aerial display system composed of a retroreflector array, an orthogonal-circular polarization g
Autor:
Hiroshi Ono, Hiroki Kushida, Hiroyuki Okamoto, Nobuhiro Kawatsuki, Kohei Noda, Tomoyuki Sasaki, Moritsugu Sakamoto
Publikováno v:
Optics Communications. 431:63-67
We report the propagation properties of polarized terahertz (THz) waves in a liquid crystal (LC) cell with subwavelength metallic gratings to produce transmissive THz elements with electrical tunability. One-dimensional metallic gratings, which can b
Autor:
Yusuke Higa, Kohei Noda, Hiroshi Ono, Masayuki Tanaka, Nobuhiro Kawatsuki, Moritsugu Sakamoto, Yusuke Kaneko, Tomoyuki Sasaki
Publikováno v:
Liquid Crystals XXIV.
In recent years, vector beam (VB)-based optical multiplexing communication is attracting attention to increase the information transfer capacity, and hence several types of VB demultiplexers fabricated by using liquid crystals have been reported. In
Autor:
Moritsugu Sakamoto, Kazunari Ashikawa, Tomoyuki Sasaki, Hiroshi Ono, Ryusei Momosaki, Nobuhiro Kawatsuki, Kohei Noda
Publikováno v:
Optics letters. 44(24)
We have succeeded in forming a polarization grating whose polarization diffraction properties are extremely independent of the incident angle by using polymer liquid crystal exhibiting biaxial optical anisotropy. It is considered that the extension o
Autor:
Moritsugu Sakamoto, Nobuhiro Kawatsuki, Kohei Noda, Ryusei Momosaki, Hiroshi Ono, Tomoyuki Sasaki, Kazunari Ashikawa
Publikováno v:
2019 24th Microoptics Conference (MOC).
In this work, a polarization grating in Raman-Nath regime was fabricated by using a photoreactive polymer liquid crystal exhibiting biaxial optical anisotropy. And from the measured characteristics, it has been demonstrated that the flat incident ang
Autor:
Nobuhiro Kawatsuki, Hiroshi Ono, Kohei Noda, Yusuke Kaneko, Moritsugu Sakamoto, Tomoyuki Sasaki
Publikováno v:
2019 24th Microoptics Conference (MOC).
A crossed-fork shaped polarization grating (Crossed-FPG) was developed as a mode demultiplexer for vector beam division multiplexing communication. The Crossed-FPG was fabricated by recording several polarization holograms between optical vortex and
Autor:
Yukitoshi Hattori, Tomoyuki Sasaki, Hiroshi Ono, Yushi Kakedo, Masayuki Tanaka, Nobuhiro Kawatsuki, Yusuke Kaneko, Kohei Noda, Takeya Sakai, Moritsugu Sakamoto
Publikováno v:
Optics Express. 29:27071
A hybrid polarization grating that can spatially separate orthogonal states of a vector beam with the same polarization topological charge is presented. The hybrid polarization grating is assembled using a fork-shaped polarization grating and a quart
Autor:
Moritsugu Sakamoto, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Yasuhiro Wada, Hiroshi Ono, Kohei Noda, Hiroyuki Okamoto
Publikováno v:
Optical Review. 24:510-516
We developed a method for the design of multilevel anisotropic diffraction gratings based on a genetic algorithm. The method is used to design the multilevel anisotropic diffraction gratings based on input data that represent the output from the requ
Autor:
Tomoyuki Sasaki, Kotaro Kawai, Moritsugu Sakamoto, Kohei Noda, Hiroshi Ono, Nobuhiro Kawatsuki
Publikováno v:
Applied optics. 58(16)
A quaternary liquid crystal (LC) grating simultaneously performs dynamic control of diffraction angle, polarization, and wavelength-separation properties as shown in the following: (1) Diffraction orders in which light waves are diffracted can be sel
Autor:
Kotaro Kawai, Kohei Noda, Hiroshi Ono, Moritsugu Sakamoto, Nobuhiro Kawatsuki, Tomoyuki Sasaki, Ryusei Momosaki
Publikováno v:
Applied optics. 58(12)
The diffraction properties of liquid crystal (LC) cells fabricated by photoalignment substrates with different periodic optical anisotropic distributions are demonstrated. The twist angle distribution structure inside the LC cells formed by the grati