Fishnet-Based Metamaterials: Spectral Tuning Through Adsorption Mechanism

Jakšić, Zoran; Tanaskovic, D.; Matovic, Jovan

doi:10.12693/aphyspola.116.625

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…The resulting freestanding structure is equivalent to double-layer fishnet metamaterials. 69 In our previous work we considered the fabrication of freestanding double-fishnet negative index metamaterials in a nanomembrane scaffold. Such geometry ensures a fully symmetrical structure without a substrate.…”

Section: Nanocompositing For Plasmonic Functionalizationmentioning

confidence: 99%

“…83 In our work we chose a different approach and analyzed double fishnets in metal-dielectric-metal freestanding sandwich nanomembranes, where apertures are opened by focused ion beam lithography. 69 One should mention that planar multilayer structures with metal cladding also ensure negative group velocity of some modes. In addition to that, they enable crossing of light line in some of these modes, i.e., support direct excitation of plasmons by propagating modes.…”

Section: Some Applications Of Nanomembrane-based Plasmonicsmentioning

confidence: 99%

“…82,83 Our prior work regarding freestanding, ultrathin fishnets considered their applicability in chemical sensing. 69 Among other real world applications of nanomembrane plasmonics is energy harvesting (light trapping). 7 Here a plasmonic membrane is transferred to a photovoltaic detector, making use of its extreme field concentration to enhance responsivity.…”

Section: Some Applications Of Nanomembrane-based Plasmonicsmentioning

confidence: 99%

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Nanomembrane-based plasmonics

et al. 2011

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This paper reviews the main properties and applications of nanomembrane-based plasmonic structures, including some results presented here for the first time. Artificial nanomembranes are a novel building block in micro-and nanosystems technologies. They represent quasi-two-dimensional (2D) freestanding structures thinner than 100 nm and with giant aspect ratios that often exceed 1,000,000. They may be fabricated as various quasi-2D metal-dielectric nanocomposites with tailorable properties; they are fully symmetric in an electromagnetic sense and support long-range surface plasmon polaritons. This makes nanomembranes a convenient platform for different plasmonic structures such as subwavelength plasmonic crystals and metamaterials and applications such as plasmon waveguides and ultrasensitive bio/chemical sensors. Among other advantages of nanomembrane plasmonics is the feasibility to fabricate flexible, transferable plasmonic guides applicable to different substrates and dynamically tunable through stretching. There are various approaches to multifunctionalization of nanomembranes for plasmonics, including the use of transparent conductive oxide nanoparticles, but also the incorporation of switchable ion channels. Since the natural counterpart of the artificial nanomembranes are cell membranes, the multifunctionalization of synthetic nanomembranes ensures the introduction of bionic principles into plasmonics, at the same time extending the toolbox of the available nanostructures, materials and functions.

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Section: Nanocompositing For Plasmonic Functionalizationmentioning

confidence: 99%

Section: Some Applications Of Nanomembrane-based Plasmonicsmentioning

confidence: 99%

Section: Some Applications Of Nanomembrane-based Plasmonicsmentioning

confidence: 99%

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Nanomembrane-based plasmonics

et al. 2011

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“…Nanocomposites based on two-dimensional arrays of subwavelength apertures in conductive material represent probably the most important class of metamaterials for the optical wavelength range. An example of such artificial structures is the fishnet metamaterials, which are the structures of choice for achieving negative value of effective refractive index in the optical range [1][2][3]. Another example is the extraordinary transmission arrays [4][5][6], where subwavelength apertures ensure, contraintuitively, an almost 100% optical transmission in a wavelength range determined by the surface plasmon resonance effects.…”

Section: Introductionmentioning

confidence: 99%

Super Unit Cells in Aperture‐Based Metamaterials

Tanaskovic

Jakšić

Obradov

et al. 2015

Journal of Nanomaterials

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An important class of electromagnetic metamaterials are aperture-based metasurfaces. Examples include extraordinary optical transmission arrays and double fishnets with negative refractive index. We analyze a generalization of such metamaterials where a simple aperture is now replaced by a compound object formed by superposition of two or more primitive objects (e.g., rectangles, circles, and ellipses). Thus obtained “super unit cell” shows far richer behavior than the subobjects that comprise it. We show that nonlocalities introduced by overlapping simple subobjects can be used to produce large deviations of spectral dispersion even for small additive modifications of the basic geometry. Technologically, some super cells may be fabricated by simple spatial shifting of the existing photolithographic masks. In our investigation we applied analytical calculations andab initiofinite element modeling to prove the possibility to tailor the dispersion including resonances for plasmonic nanocomposites by adjusting the local geometry and exploiting localized interactions at a subwavelength level. Any desired form could be defined using simple primitive objects, making the situation a geometrical analog of the case of series expansion of a function. Thus an additional degree of tunability of metamaterials is obtained. The obtained designer structures can be applied in different fields like waveguiding and sensing.

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Metamaterial Electromagnetic Wave Absorbers

2012

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The advent of negative index materials has spawned extensive research into metamaterials over the past decade. Metamaterials are attractive not only for their exotic electromagnetic properties, but also their promise for applications. A particular branch–the metamaterial perfect absorber (MPA)–has garnered interest due to the fact that it can achieve unity absorptivity of electromagnetic waves. Since its first experimental demonstration in 2008, the MPA has progressed significantly with designs shown across the electromagnetic spectrum, from microwave to optical. In this Progress Report we give an overview of the field and discuss a selection of examples and related applications. The ability of the MPA to exhibit extreme performance flexibility will be discussed and the theory underlying their operation and limitations will be established. Insight is given into what we can expect from this rapidly expanding field and future challenges will be addressed.

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Fishnet-Based Metamaterials: Spectral Tuning Through Adsorption Mechanism

Cited by 9 publications

References 9 publications

Nanomembrane-based plasmonics

Nanomembrane-based plasmonics

Super Unit Cells in Aperture‐Based Metamaterials

Metamaterial Electromagnetic Wave Absorbers

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