Triple-helical nanowires by tomographic rotatory growth for chiral photonics

Nature Communications
Marco EspositoAdriana Passaseo

Abstract

Three dimensional helical chiral metamaterials resulted in effective manipulation of circularly polarized light in the visible infrared for advanced nanophotonics. Their potentialities are severely limited by the lack of full rotational symmetry preventing broadband operation, high signal-to-noise ratio and inducing high optical activity sensitivity to structure orientation. Complex intertwined three dimensional structures such as multiple-helical nanowires could overcome these limitations, allowing the achievement of several chiro-optical effects combining chirality and isotropy. Here we report three dimensional triple-helical nanowires, engineered by the innovative tomographic rotatory growth, on the basis of focused ion beam-induced deposition. These three dimensional nanostructures show up to 37% of circular dichroism in a broad range (500-1,000 nm), with a high signal-to-noise ratio (up to 24 dB). Optical activity of up to 8° only due to the circular birefringence is also shown, tracing the way towards chiral photonic devices that can be integrated in optical nanocircuits to modulate the visible light polarization.

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Citations

Aug 27, 2016·Nano Letters·Marco EspositoAdriana Passaseo
Dec 2, 2015·Scientific Reports·Xiaorui TianMengtao Sun
May 18, 2017·Nanomaterials·Xiaoliang MaXiangang Luo
Feb 1, 2017·Advanced Materials·David C HooperVentsislav K Valev
Jun 8, 2017·ACS Nano·Yong WangHongyu Chen
Oct 16, 2015·Nanoscale·Marco EspositoAdriana Passaseo
Jul 28, 2017·Sensors·Yohan LeeByoungho Lee
Oct 7, 2016·Chemical Communications : Chem Comm·Sang Min KimSungho Park
Sep 30, 2017·Small·Zhifeng Huang, Junjun Liu
Feb 1, 2017·Scientific Reports·Jingpei HuChinhua Wang
Jun 23, 2015·Advanced Materials·Lei KangWenshan Cai
May 18, 2019·Light, Science & Applications·Yang ChenJie Gao
Jun 1, 2017·Science Advances·Mario HentschelNa Liu
Jul 14, 2017·Scientific Reports·Alessio BenedettiConcita Sibilia
Jan 16, 2019·Applied Optics·Xiaoyu FengZhongyue Zhang
Sep 15, 2015·Optics Letters·Johannes Kaschke, Martin Wegener
Jun 9, 2016·Small·Xiaoli Wang, Zhiyong Tang
Oct 19, 2017·Optics Express·Fengchun ZhangSonghao Liu
Sep 26, 2015·Optics Express·Tzu-Hung KaoYu-Chueh Hung
Dec 31, 2020·Micromachines·Mariachiara ManoccioVittorianna Tasco
Dec 30, 2020·Proceedings of the National Academy of Sciences of the United States of America·Jincheng NiCheng-Wei Qiu
Feb 18, 2021·Advanced Materials·Junjun LiuZhifeng Huang
Apr 4, 2018·Journal of the American Chemical Society·Makoto Nakagawa, Takeshi Kawai

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Methods Mentioned

BETA
circular dichroism

Software Mentioned

Lumerical FDTD Solutions

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