Title:
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Ultrabroadband light absorbing Fe/polymer flexible metamaterial for soft opto-mechanical devices
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Author:
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Güell-Grau, Pau; Pi Vila, Francesc; Villa, Rosa; Nogués, Josep; Alvarez, Mar; Sepúlveda, Borja
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Abstract:
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Altres ajuts: ICN2 is funded by the CERCA programme/Generalitat de Catalunya. |
Abstract:
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Ultrabroadband light absorbers are attracting increasing interest for applications in energy harvesting, photodetection, self-regulated devices or soft robotics. However, current absorbers show detrimental insufficient absorption spectral range, or light angle and polarization dependence. Here we show that the unexplored optical properties of highly-damped plasmonic materials combined with the infrared absorption of thin polymer films enable developing ultrabroadband light-absorbing soft metamaterials. The developed metamaterial, composed of a nanostructured Fe layer mechanically coupled to a thin polydimethylsiloxane (PDMS) film, shows unprecedented ultrabroadband and angle-independent optical absorption (averaging 84% within 300-18000 nm). The excellent photothermal efficiency and large thermal-expansion mismatch of the metamaterial is efficiently transformed into large mechanical deflections, which we exploit to show an artificial iris that self-regulates the transmitted light power from the ultraviolet to the long-wave infrared, an untethered light-controlled mechanical gripper and a light-triggered electrical switch. |
Subject(s):
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-Ultrabroadband absorption -Soft metamaterials -Highly-damped plasmonics -Iron nanostructures -Optomechanical devices |
Rights:
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open access
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https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Document type:
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Article |
Published by:
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Share:
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Uri:
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https://ddd.uab.cat/record/268428
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