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arXiv · 1902.06834

All-optical reconfigurable chiral meta-molecules

Linhan Lin·Sergey Lepeshov·Alex Krasnok·Taizhi Jiang·Xiaolei Peng·Brian A. Korgel·Andrea Alù·Yuebing Zheng
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Abstract

Chirality is a ubiquitous phenomenon in the natural world. Many biomolecules without inversion symmetry such as amino acids and sugars are chiral molecules. Measuring and controlling molecular chirality at a high precision down to the atomic scale are highly desired in physics, chemistry, biology, and medicine, however, have remained challenging. Herein, we achieve all-optical reconfigurable chiral meta-molecules experimentally using metallic and dielectric colloidal particles as artificial atoms or building blocks to serve at least two purposes. One is that the on-demand meta-molecules with strongly enhanced optical chirality are well-suited as substrates for surface-enhanced chiroptical spectroscopy of chiral molecules and as active components in optofluidic and nanophotonic devices. The other is that the bottom-up-assembled colloidal meta-molecules provide microscopic models to better understand the origin of chirality in the actual atomic and molecular systems. Keywords: opto-thermoelectric tweezers; optical chirality; metamolecules; bottom-up assembly

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Linhan Lin, Sergey Lepeshov, Alex Krasnok, Taizhi Jiang, Xiaolei Peng, Brian A. Korgel, Andrea Alù, Yuebing Zheng. 2019-02-18. All-optical reconfigurable chiral meta-molecules. https://arxiv.org/abs/1902.06834

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