Three‐Dimensional Bichiral Plasmonic Crystals Fabricated by Direct Laser Writing and Electroless Silver Plating

Radke, André; Gissibl, Timo; Klotzbücher, T.; Gießen, Harald

doi:10.1002/adma.201100543

Cited by 193 publications

(178 citation statements)

References 22 publications

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“…Several variations of this idea have meanwhile been published aiming at further improving the circular-polarizer performance. For example, three-dimensional bi-chiral arrangements [4,5] promise a more isotropic response, however, they largely deteriorate both the bandwidth and the extinction ratio [5]. Tapered helices increase the bandwidth to about 1.5 octaves, increase the extinction, and reduce polarization conversion [6].…”

Section: Introductionmentioning

confidence: 99%

On metamaterial circular polarizers based on metal N-helices

Kaschke¹,

Gansel²,

Wegener³

2012

Opt. Express

117

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Metal-helix based metamaterials have been introduced as compact and broadband circular polarizers. However, the end of the metal wire together with the helix center defines an axis in space, which unavoidably breaks the rotational symmetry at the metamaterial surface. This introduces linear birefringence. Symmetry can be recovered by considering an integer number, e.g. N = 4, of intertwined helices arranged to a square array. We show that the operation principles are fundamentally different though. Metamaterial circular polarizers based on N = 4 helices, unlike single helices, inherently require absorption of the constituent metal. Otherwise, the combination of a four-fold rotational axis and time-inversion symmetry strictly forbids circular-polarizer action. Our symmetry analysis is confirmed by extensive numerical calculations comparing results for perfect electric conductors with those for a free-electron Drude metal with finite damping.

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Section: Introductionmentioning

confidence: 99%

On metamaterial circular polarizers based on metal N-helices

Kaschke¹,

Gansel²,

Wegener³

2012

Opt. Express

117

View full text Add to dashboard Cite

show abstract

“…Recently, using the focused ion beam-induced deposition (FIBID) technology, it has been possible to reach a broadband CD in the near-infrared optical region reducing the helix dimension to submicron size 22 . Wide band circular dichroic properties in the visible range were also demonstrated by planar stacked structures 15 , while 3D bichiral photonic crystals 23,24 , thought to limit the dependence of chiral effects on structure orientation, lead to the reduction of the infrared bandwidth.…”

mentioning

confidence: 99%

Triple-helical nanowires by tomographic rotatory growth for chiral photonics

et al. 2015

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Three dimensional helical chiral metamaterials resulted in effective manipulation of circularly polarized light in the visible infrared for advanced nanophotonics. Their potentialities are severely limited by the lack of full rotational symmetry preventing broadband operation, high signal-to-noise ratio and inducing high optical activity sensitivity to structure orientation. Complex intertwined three dimensional structures such as multiple-helical nanowires could overcome these limitations, allowing the achievement of several chiro-optical effects combining chirality and isotropy. Here we report three dimensional triple-helical nanowires, engineered by the innovative tomographic rotatory growth, on the basis of focused ion beam-induced deposition. These three dimensional nanostructures show up to 37% of circular dichroism in a broad range (500-1,000 nm), with a high signal-to-noise ratio (up to 24 dB). Optical activity of up to 8°only due to the circular birefringence is also shown, tracing the way towards chiral photonic devices that can be integrated in optical nanocircuits to modulate the visible light polarization.

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“…Complicated structures combined with high-cost equipment make large-area (bigger than one centimetre in each dimension) metallic metamaterials difficult and expensive, and three-dimensional metallic metamaterials are even more difficult to obtain 14 . Nevertheless, with the help of three-dimensional laser direct writing 17,18 and nanoimprint 19 technology, large-area three-dimensional chiral 17,18 and 75 cm 2 size fishnet 19 metamaterials were achieved. In any case, new materials and strategies are necessary for facile processing large-scale metamaterials working in the visible and near-infrared regions.…”

mentioning

confidence: 99%

Monodisperse silicon nanocavities and photonic crystals with magnetic response in the optical region

et al. 2013

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It is generally accepted that the magnetic component of light has a minor role in the lightmatter interaction. The recent discovery of metamaterials has broken this traditional understanding, as both the electric and the magnetic field are key ingredients in metamaterials. The top-down technology used so far employs noble metals with large intrinsic losses. Here we report on a bottom-up approach for processing metamaterials based on suspensions of monodisperse full dielectric silicon nanocavities with a large magnetic response in the near-infrared region. Experimental results and theory show that siliconcolloid-based liquid suspensions and photonic crystals made of two-dimensional arrays of particles have strong magnetic response in the near-infrared region with small optical losses. Our findings might have important implications in the bottom-up processing of large-area low-loss metamaterials working in the near-infrared region.

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Three‐Dimensional Bichiral Plasmonic Crystals Fabricated by Direct Laser Writing and Electroless Silver Plating

Cited by 193 publications

References 22 publications

On metamaterial circular polarizers based on metal N-helices

On metamaterial circular polarizers based on metal N-helices

Triple-helical nanowires by tomographic rotatory growth for chiral photonics

Monodisperse silicon nanocavities and photonic crystals with magnetic response in the optical region

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