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Optical vortex pulse illumination to create chiral monocrystalline silicon nanostructures
Author(s) -
Takahashi Fuyuto,
Takizawa Shun,
Hidai Hirofumi,
Miyamoto Katsuhiko,
Morita Ryuji,
Omatsu Takashige
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201532661
Subject(s) - monocrystalline silicon , materials science , silicon , optical vortex , optics , nanostructure , optoelectronics , coaxial , nanotechnology , physics , beam (structure) , electrical engineering , engineering
We discovered that a nanosecond optical vortex pulse can create a chiral cone‐shaped monocrystalline silicon (Si) nanostructure (chiral Si nanocone) by transferring its optical angular momentum to a monocrystalline Si substrate. The fabricated Si nanocone, with a length of 4.8 µm and a tip curvature of ∼110 nm, was fully monocrystalline, and it had a spiral structure with an 86 nm line width on a conical surface. Furthermore, its chirality was also determined directly from the handedness of the optical vortex pulse. Such chiral Si nanocones may enable the development of novel silicon photonic devices as well as ultra‐highly efficient photovoltaic devices.