Optical vortex pulse illumination to create chiral monocrystalline silicon nanostructures
Optical vortex pulse illumination to create chiral monocrystalline silicon nanostructures
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DOI：
10.1002/pssa.201532661
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发表时间：
2016-04-01
影响因子：
2
通讯作者：
Omatsu, Takashige
中科院分区：
文献类型：
--
作者：
Takahashi, Fuyuto;Takizawa, Shun;Omatsu, Takashige
我们发现，纳秒光涡旋脉冲可以创建一个手性锥形单晶硅（Si）纳米结构（手性Si nanocone）通过转移其光学角动量到单晶Si衬底。所制备的硅纳米锥长4.8 μ m，锥尖曲率约110nm，为全单晶结构，在锥面上具有线宽为86nm的螺旋结构。此外，它的手征性也直接由光涡旋脉冲的旋向性决定。这种手性Si纳米锥可以使得能够开发新型硅光子器件以及超高效率光伏器件。
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 mu m and a tip curvature of approximate to 110nm, was fully monocrystalline, and it had a spiral structure with an 86nm 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.