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Topology-Changing Broadband Metamaterials Enabled by Closable Nanotrenches

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Title
Topology-Changing Broadband Metamaterials Enabled by Closable Nanotrenches
Author
Kim, DasomYun, Hyeong SeokDas, BamadevRhie, JiyeahVasa, ParindaKim, Young-IlChoa, Sung-HoonPark, NamkyooLee, DukhyungBahk, Young-MiKim, Dai-Sik
Issue Date
2021-05
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.21, no.10, pp.4202 - 4208
Abstract
One of the most straightforward methods to actively control optical functionalities of metamaterials is to apply mechanical strain deforming the geometries. These deformations, however, leave symmetries and topologies largely intact, limiting the multifunctional horizon. Here, we present topology manipulation of metamaterials fabricated on flexible substrates by mechanically closing/opening embedded nanotrenches of various geometries. When an inner bending is applied on the substrate, the nanotrench closes and the accompanying topological change results in abrupt switching of metamaterial functionalities such as resonance, chirality, and polarization selectivity. Closable nanotrenches can be embedded in metamaterials of broadband spectrum, ranging from visible to microwave. The 99.9% extinction performance is robust, enduring more than a thousand bending cycles. Our work provides a wafer-scale platform for active quantum plasmonics and photonic application of subnanometer phenomena.
URI
https://scholarworks.unist.ac.kr/handle/201301/53872
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00025
DOI
10.1021/acs.nanolett.1c00025
ISSN
1530-6984
Appears in Collections:
PHY_Journal Papers
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