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Vapor-deposited plasmonic absorbers with tunable atomic-layer-deposited dielectric layer

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Abstract

Spatial order or periodicity is usually required and constructed with tens of nanometers in the feature size, which makes it difficult to process the near-perfect metamaterial absorbers working in the visible range in large-area and mass-production scale. Although many established technologies and theoretical modeling methods were used for order-based metamaterials, aperiodic or disordered structures have been gradually recognized to achieve similar functionalities for which the ordered structures are overwhelmingly used. Here, we demonstrated the vapor-deposited ‘amorphous’ metamaterials as controlled-reflectance surfaces and tunable near-perfect metamaterial absorbers without the use of the lithographically ordered arrays, the prefabricated colloidal metal nanoparticles or the multilayer of nanoparticles. The flexible construction, the control of the monolayer of nanoparticles and the atomic-layer-deposited dielectric spacer layer provide more insight for understanding the controlled-reflectance surfaces. We further presented the inversed plasmonic metamaterial architectures for distinguishing plasmonic absorption by means of the tunable atomic-layer-deposited spacer layer.

© 2015 Optical Society of America

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