Analysis of the Optical Properties of Chiral Au Nanorod Stacks

Dios, Carolina de; Feng, Huanhuan; García, Fernando; Cebollada, A.; Armelles, G.

doi:10.1007/s11468-018-0722-6

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…One-dimensional Au nanostructures have received considerable attention due to their size-dependent optical, catalytic, and electronic properties. 128,129 The research interest in Au NRs over the past decades has stemmed from their anisotropic conguration and unique optical properties. Since its inception and commercialization, Au NRs have made a revolutionary impact in the eld of bioanalysis and have become a powerful tool for bioanalytical chemistry.…”

Section: Synthesis Of Au Nrsmentioning

confidence: 99%

Gold nanocrystals: optical properties, fine-tuning of the shape, and biomedical applications

Wei

Yang

et al. 2022

RSC Adv.

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Section: Synthesis Of Au Nrsmentioning

confidence: 99%

Gold nanocrystals: optical properties, fine-tuning of the shape, and biomedical applications

Wei

Yang

et al. 2022

RSC Adv.

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“…[25] In addition to designing various nanostructures to generate CD effects, researchers have also focused on tuning CD modes of nanostructures. [26][27][28][29][30][31][32][33][34] Different approaches can be used to tune CD modes, including their intensity and resonance position. First, CD modes can be changed by the dielectric environment, such as an external magnetic field, [26,27] uneven heat field [28] and so on.…”

Section: Introductionmentioning

confidence: 99%

“…[29] Finally, a tunable phase of the incident light can be obtained by changing the distance between two parts of a nanostructure, [30][31][32] or twisting a layer of a double-layer structure. [33,34] The abovementioned methods all break the symmetry and change the chirality of nanostructures either directly or indirectly. All of those methods directly or indirectly provide a way to change the chirality of truly chiral nanostructures (without an inherent mirror symmetry plane).…”

Section: Introductionmentioning

confidence: 99%

Reversible Circular Dichroism Induced by Energy Losses without Changing Chirality of Structure

Deng¹,

Wang

et al. 2020

Annalen der Physik

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Tunable circular dichroism (CD) is widely used in biology signal detection and chemical analysis. Researchers usually tune CD by changing the chirality and symmetry of nanostructures either directly or indirectly. Changes to a planar nanostructure's chirality are resisted by its structural reciprocity, which also constrains its CD tuning. However, the distribution of finite non‐radiative (ohmic) losses on a planar nanostructure will not be constrained by the reciprocity of structure. Here, a nanostructure is designed to tune the intensity of energy losses rather than change the chirality and symmetry of the whole structure. The results show that not only are the position and intensity of CD affected, but also the sign of the CD signal changes. These methods and results can help in utilizing the new approach to tune the modes and sign of a CD signal.

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Mueller matrix study of the dichroism in nanorods dimers: rod separation effects

Dios¹,

Jiménez²,

García³

et al. 2019

Opt. Express

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We have studied the optical response of chiral metastructures composed of a disordered array of couples of plasmonic Au nanorods helically piled along the vertical direction. The fabrication is based on the use of multiaxial and multimaterial evaporation of the different metastructure building blocks through nanohole masks. From the analysis of the Mueller Matrix elements of the system, obtained both experimentally and from dedicated numerical simulations in forward and backward illumination conditions, we have been able to determine the linear and circular dichroic response of the system, as well as to sort out the optical anisotropy and intrinsic circular dichroism contributions to the circular differential extinction. We have also analyzed the dependence of the optical properties as a function of the angle between the rods and of the thickness of the dielectric separator. The study of quasiplanar as well as three-dimensional structures allows unraveling the role played by interactions between the constituting building blocks and, in particular, the distance between rods. We have experimentally and theoretically observed a decrease of the circular dichroic contribution and a change of the optical anisotropic contribution when the structures evolve from non-planar to planar.

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Analysis of the Optical Properties of Chiral Au Nanorod Stacks

Cited by 3 publications

References 27 publications

Gold nanocrystals: optical properties, fine-tuning of the shape, and biomedical applications

Gold nanocrystals: optical properties, fine-tuning of the shape, and biomedical applications

Reversible Circular Dichroism Induced by Energy Losses without Changing Chirality of Structure

Mueller matrix study of the dichroism in nanorods dimers: rod separation effects

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