Effect of Alignment on a Liquid Crystal/Split‐Ring Resonator Metasurface

Atorf, Bernhard; Mühlenbernd, Holger; Muldarisnur, Mulda; Zentgraf, Thomas; Kitzerow, Heinz‐S.

doi:10.1002/cphc.201301069

Cited by 11 publications

(8 citation statements)

References 36 publications

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“…By further scaling down LC background metamaterials, the real time control of IR [89][90][91][92][93][94] and visible light [95][96][97] are realized as shown in Figure 3. The tunability can be fulfilled either from the optical nonlinear response or the electrical control of the LC.…”

Section: Metamaterials In Lcmentioning

confidence: 99%

Metafluidic metamaterial: a review

Song

Zhu

et al. 2018

Advances in Physics: X

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Metafluidic metamaterial is a metamaterial the optical response of which is dependent on fluid contributed metamolecules. The dependence originates either from a fluid background coupling to the metamolecule or from the resonance in a liquid structured metamolecule. Different liquid materials including water, liquid crystal, and liquid metals are applied to realize the metafluidic metamaterial. Sophisticated technologies like electric bias and microfluidic system have been used for active control of metafluidic metamaterials which provide a new platform for electromagnetic wave manipulation and metadevice realization. The liquid background and significant tunability of the metafluidic metamaterial promise numerous applications, such as material sensing, bio-detection, energy harvesting, and imaging, just to name a few.

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Section: Metamaterials In Lcmentioning

confidence: 99%

Metafluidic metamaterial: a review

Song

Zhu

et al. 2018

Advances in Physics: X

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“…Recently developed tuning methods are based on micro-or nanoelectromechanical systems [15,16], charge carrier density changes in semiconductors [17][18]21], amorphous-crystalline phase changes in dielectrics [22,23] or metal-insulator transitions in VO2 [24][25][26]. A more traditional way of achieving addressable optical properties is based on the use of a liquid crystal (LC), which serves as a dielectric host with an effective permittivity that is sensitive to temperature [27] and external magnetic [28] or electric fields [27,[29][30][31][32][33][34][35][36][37][38]. As the name indicates, LCs combine properties of liquids and crystals.…”

Section: Introductionmentioning

confidence: 99%

All-optical switching of a dye-doped liquid crystal plasmonic metasurface

et al. 2020

Self Cite

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A switchable metasurface composed of plasmonic split ring resonators and a dyedoped liquid crystal is developed. The transmission of the metasurface in the infrared spectral range can be changed by illuminating the dye-doped liquid crystal with light in the visible spectral range. The effect is particularly efficient in the case of hybrid alignment of the liquid crystal, i. e. alignment of the director perpendicular to the surface on one substrate and parallel alignment on the counter substrate. This all-optical switching effect can be attributed to the behavior described in earlier works as colossal optical nonlinearity or surface-induced nonlinear optical effect.

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“…One of the strong approaches for the fabrication of metamaterials is to use the self assembly or assembly of the colloidal metamaterial building blocks (particles) into an ordered structure, notably also through the use of liquid crystals, which by themselves can modify the flow of light 14–16 and can be used for various optical applications 17,18 . Indeed, liquid crystalline colloids were rather recently shown to assemble into various stable colloidal configurations and structures 19,20 , from the configurations of spheres 21,22 to different configurations of flat particles, such as square and circular platelets 23 . Optically and material-wise, liquid crystal colloids perform as birefringent fluids with spatially varying birefringence that have embedded dielectric or metallic particles of various sizes and/or shapes.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of metamaterial split ring nematic colloids

Pusovnik

Aplinc

Ravnik

2019

Sci Rep

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The fabrication of 3D bulk metamaterials, optical materials with sub-wavelength building blocks, is an open challenge, along with the tuning of their optical properties, such as transmissivity or exit polarization where a possible approach is to embed liquid crystalline materials into metamaterials and use their tunable birefringence. In this work, we explore using numerical modelling the photonic properties of a composite of split ring resonator colloidal particles, dispersed in nematic liquid crystal, which was optimised to enable self-assembly fully. Specifically, using generalised FDTD simulations for light propagation in birefringent profiles, we demonstrate the photonic response of single particles, 2D and 3D colloidal crystals. The material transmittance is shown to exhibit clear resonant behaviour with the resonances tunable with the birefringence in the order of ~5%. Electric and magnetic field modes emergent on the particles are shown, as affected by the surrounding nematic birefringence, both the in the slit region of the split ring resonator (SRR) particles as well as around the particles. Observed photonic response is further explained by introducing basic equivalent LC circuits. Finally, this work is aimed at developing soft and fluid metamaterials, which exhibit optical anisotropy in the photonic response as a potent mechanism for controlling the flow of light at wavelength and even sub-wavelength scales.

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Effect of Alignment on a Liquid Crystal/Split‐Ring Resonator Metasurface

Cited by 11 publications

References 36 publications

Metafluidic metamaterial: a review

Metafluidic metamaterial: a review

All-optical switching of a dye-doped liquid crystal plasmonic metasurface

Optical properties of metamaterial split ring nematic colloids

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