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Conferences > OPJ > 2017 > NOM2 > 30pON4
  • 2017 OPJ-OSA Joint Symposia on Nanophotonics and Digital Photonics
  • OSA Technical Digest (online) (Optica Publishing Group, 2017),
  • paper 30pON4

Twisted Au nanoneedle fabricated by optical vortex illumination

Yuri Nakamura, Tatsuyuki Sugimoto, Kai Izumisawa, Katsuhiko Miyamoto, Tsukasa Torimoto, Ryuji Morita, Keisaku Yamane, and Takashige Omatsu

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Abstract

We discover that a nanosecond 532 nm optical vortex laser pulse forces a gold to form a ‘twisted’ nanoneedle with a tip diameter and a length of 100 nm and 6 μm, respectively. The twisted direction of the needle was assigned by a handedness of the irradiated optical vortex. We also found that the circularly polarized optical vortex increased a winding number of the twisted needle with a help of spin angular momentum.

© 2017 Optical Society of Japan

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