Skyrmions, topologically stable configurations of a three-component vector field with sophisticated textures, have been considered in many contexts, including atomic physics, Bose–Einstein condensates, liquid crystals, and magnetic materials. Alth...
Rong Wei   Haruki Kawaguchi   Kaito Sato   Sayaka Kai   Keisaku Yamane   Ryuji Morita   Ken-ichi Yuyama   Satoyuki Kawano   Katsuhiko Miyamoto   Nobuyuki Aoki   Takashige Omatsu   
APL Photonics 9(3) 2024年3月
We demonstrate high-definition, direct-printing of micron-scale metallic dots, comprised of close-packed gold nanoparticles, by utilizing the optical vortex laser-induced forward transfer technique. We observe that the spin angular momentum of the...
Multicolor visible high-order Bessel (Bessel-vortex) beams which have a helical wavefront and a long confocal length have garnered significant interest for applications in materials processing and biomedical technologies. In this paper, we demonst...
Jun Hyung Lee   Yoshihiko Arita   Reimon Matsuo   Shunsuke Toyoshima   Katsuhiko Miyamoto   Kishan Dholakia   Takashige Omatsu   
Proceedings of SPIE - The International Society for Optical Engineering 10712 2018年 [査読有り]
We demonstratc a self-written sub-millimeter (>
300 μm) helical fibcr in a photo-cure resin by irradiation of non- diffractive la-order Bessel beam with an orbital angular momentum. The twisted direction of the helical fiber can be controlled by...
Proceedings of SPIE - The International Society for Optical Engineering 10712 2018年 [査読有り]
We discover that 1.06 μm picosecond vortex pulses induce chiral mass-transport to form a single-armed chiral surface relief in azo-polymer through two photon absorption process. The surface relief exhibits a diameter of a 2.5μm, i.e. 0.7 times of ...
J. C. Tung   Y. Y. Ma   Y. F. Chen   K. Miyamoto   T. Omatsu   
Proceedings of SPIE - The International Society for Optical Engineering 10712 2018年 [査読有り]
We first demonstrated the generation of an optical bottle beam with a zero-intensity region surrounded by threedimensional bright regions from an intra-cavity frequency-doubled Nd:YVO4 laser with a nearly hemispherical cavity configuration. We als...
We present a tunable optical vortex parametric oscillator with versatile OAM. The OAM mode with a designated topological charge within the range of -1~3 was selectively generated by simply shortening or extending the cavity.