Plasmonic Black Metasurface by Transfer Printing

Abstract

also drawn enormous attention due to their highly tunable electromagnetic proper ties over a broad range of frequencies and novel fields of research such as flatland optics, hyperlenses, and nanoscopic phase manipulation [7][8][9][10][11][12][13][14][15] Especially plasmonic metasurfaces benefit from extraordinary high field intensities, enabling improved absorption of electromagnetic radiation at visible and infrared wavelengths. [16][17][18][19][20] Providing high electrical with thermal con ductivity, plasmonic metamaterial absorbers are therefore promising for various appli cations such as solar energy harves ting, [21,22] heat management, [18] electro thermal systems, [23] sensors [5,17,24] as well as nonlinear optics, [25] and could also serve as electrodes and heat sinks at the same time.In order to achieve absorption in plas monic metasurface-based systems, several methods have been developed. Many of them rely on expensive bottomup processes or need relatively large amounts of metal and/or strongly roughened surfaces in order to obtain broadband absorption. [26][27][28] On the other hand, highly absorbing systems with low material consumption have been realized using dielectric films in order to build metal-insu lator-metal (MIM) absorbers. [9,29,30] Further on, recent MIM absorbers are compatible with costefficient statistical large scale production methods. [31][32][33][34] However, due to the dielectric films, the electrical and thermal conductivity of MIM absorbers are not ideal. If the functionality of MIM absorbers could be preserved without any dielectrics, highly conductive broadband absorbers on large scales with low production costs would be achieved.We present a novel metasurface consisting of only silver, demonstrating the resonant nature of MIM absorbers without the necessity of any insulating spacer material. The technique is performed by polydimethylsiloxane (PDMS)assisted transfer printing of silver nanoparticles (AgNP) directly on top of a thin continuous silver (Ag) film, thus forming a metasurface. In addition to that, the technique can easily be used for costefficient, largearea fabrication on arbitrary substrates. The development of the metasurface is based on the experimental observation, that the absorption of AgNP films on PDMS is significantly enhanced, when they are brought into contact with a silver thin film. Results and Discussion Preliminary Simulation of Simplified GeometriesWe first study this phenomenon with numerical simula tions, whereby AgNPs are approximated by perfect silver In various applications simultaneous large optical absorption and large thermal and electrical conductivity are desired. As bulk materials cannot fulfill that need, metamaterials have been developed that often require complicated nanotechnology. The work presents the facile fabrication of black metasurfaces consisting of silver only. Silver nanoparticles (AgNPs) are transfer printed onto a silver film from a polydimethylsiloxane (PDMS) stamp. Numerical simulations confirm that gap plasmon modes b...

High‐Contrast Switching of Light Enabled by Zero Diffraction

“…Other parameters are identical to the leaky waveguide structure discussed in Figure 1f,g and 2. [ 35–37 ]…”

Light‐Controlled Fabrication of Disordered Hyperuniform Metasurfaces

“…[29] On the one hand, AgNPs exhibit comparably strong optical absorption, especially in close proximity to a silver surface, which can be exploited for metasurface absorbers. [30] On the other hand, the replication of the structures into a polymer could provide access to low-loss photonic applications, which require dielectric materials, as well. In this context, the presented fabrication method could be used for the implementation of templates for the mass fabrication of high-quality photonic metasurfaces.…”

Plasmon‐Induced Disorder Engineering for Robust Optical Sensors

“…Self-organization of nanostructures has, in turn, proven itself as a promising bottom-up approach for more facile manufacturing procedures. In the past, this has been used for many purposes in ordered and disordered systems, with applications including solar cells, [17] organic lasers, [18] broadband plasmonic absorbers, [19] plasmonic crystals, [20] and flexible electronics. [21] Among various strategies that enable self-organization of nanostructures, [22][23][24] the light-controlled growth of AgNPs at distinct positions on a transparent substrate via the excitation of LSP resonances is one promising approach.…”

“…Self‐organization of nanostructures has, in turn, proven itself as a promising bottom‐up approach for more facile manufacturing procedures. In the past, this has been used for many purposes in ordered and disordered systems, with applications including solar cells, [ 17 ] organic lasers, [ 18 ] broadband plasmonic absorbers, [ 19 ] plasmonic crystals, [ 20 ] and flexible electronics. [ 21 ]…”