Negative index optical chiral metamaterial based on asymmetric hexagonal arrays of metallic triangular nanoprisms

Giloan, M.; Aştilean, Simion

doi:10.1016/j.optcom.2013.10.070

Cited by 22 publications

(20 citation statements)

References 22 publications

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Section: Chirality Parametersmentioning

confidence: 99%

“…A wide range of structure types have been numerically investigated and demonstrated negative refractive index. For example, Giloan and Astilean demonstrated negative index in a bi‐layered planar metamaterial consisting of triangular gold elements (Figure h). Fang et al demonstrated a less common approach to inducing 3D chirality, by using a trench to “sink” the central region of a gammadion structure, resulting in strong chirality.…”

Section: Chirality Parametersmentioning

confidence: 99%

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Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Collins

Kuppe

Hooper

et al. 2017

Advanced Optical Materials

288

246

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Throughout the 19th and 20th century, chirality has mostly been associated with chemistry. However, while chirality can be very useful for understanding molecules, molecules are not well suited for understanding chirality. Indeed, the size of atoms, the length of molecular bonds and the orientations of orbitals cannot be varied at will. It is therefore difficult to study the emergence and evolution of chirality in molecules, as a function of geometrical parameters. By contrast, chiral metal nanostructures offer an unprecedented flexibility of design. Modern nanofabrication allows chiral metal nanoparticles to tune the geometric and optical chirality parameters, which are key for properties such as negative refractive index and superchiral light. Chiral meta/nano‐materials are promising for numerous technological applications, such as chiral molecular sensing, separation and synthesis, super‐resolution imaging, nanorobotics, and ultra‐thin broadband optical components for chiral light. This review covers some of the fundamentals and highlights recent trends. We begin by discussing linear chiroptical effects. We then survey the design of modern chiral materials. Next, the emergence and use of chirality parameters are summarized. In the following part, we cover the properties of nonlinear chiroptical materials. Finally, in the conclusion section, we point out current limitations and future directions of development.

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Section: Chirality Parametersmentioning

confidence: 99%

Section: Chirality Parametersmentioning

confidence: 99%

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Collins

Kuppe

Hooper

et al. 2017

Advanced Optical Materials

288

246

View full text Add to dashboard Cite

show abstract

“…The metamaterial is known for its particular characteristics and structure, which cannot be found in nature, and has been designed artificially. 1,2 This extraordinary behavior of the metamaterial has been considered for manipulating the electromagnetic wave (EM) in the optical regime 3 considering the surface plasmon (SP) 4 and localized surface plasmon resonance (LSPR). 5 The optical metamaterials are used for various goals such as bending 6 or absorbing the electromagnetic wave, 7 which is essential for a perfect broadband absorber 8 or optical cloak design.…”

Section: Introductionmentioning

confidence: 99%

Engineered nano-sphere array of gold-DNA core–shells and junctions as opto-plasmonic sensors for biodetection

et al. 2021

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“…Thus, it is easy to perform the measurements of (optical parameters) such as absorption, reflection, scattering, and transmission [12][13][14][15]. Over the last few years, different shapes of nanoantenna have been proposed by changing arrangement of the parts to obtain multi resonances in a range of mid IR [16] and improve the reflection for spectrometry [17], such as Bowtie [18], loop [19], and triangular [20] as a basic design. On the other hand, there are complicated structures such as the U-shape [21], and SRR (split ring resonator) [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Studying and Simulation of a Different Formation of U Shape with T and L Shapes of Plasmonic Nanoantennas With Variable Substrates

Aljanabi

Ihara

Ishikawa

et al. 2018

BJSTR

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The optical properties of surface plasmons at the resonant wavelength depend on the geometrical nanostructure of materials, refractive indices, thickness (materials and dielectrics), and shapes of the formation unit cell nanoantennas. In this study, we take different shapes of plasmonic nanoantenna structures with a prototype of single and dual U-shapes as a common part to format a unit cell of nanoantenna by adding T and L-shapes based on a different dielectric such as, a silicon nitride, magnesium fluoride, and aluminium oxide, with gold as a variation of refractive indices. A single U-shape provides a dual spectral resonance at a wavelength range of (500-950) nm. Thus, in these proposed structures, we try to achieve a triple band with the best transmission and field enhancement distributions (electric field intensity and magnetic field intensity), and we design and simulate these fractals by using the 3D-finite difference time domain method Lumerical program with an incident source between a visible to infrared range. From the results, the triple bands have a wide range of applications in medicine as biosensors and in communication systems (optical modulators).

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Negative index optical chiral metamaterial based on asymmetric hexagonal arrays of metallic triangular nanoprisms

Cited by 22 publications

References 22 publications

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Chirality and Chiroptical Effects in Metal Nanostructures: Fundamentals and Current Trends

Engineered nano-sphere array of gold-DNA core–shells and junctions as opto-plasmonic sensors for biodetection

Studying and Simulation of a Different Formation of U Shape with T and L Shapes of Plasmonic Nanoantennas With Variable Substrates

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