Interaction Effects between Magnetic and Chiral Building Blocks: A New Route for Tunable Magneto-chiral Plasmonic Structures

Armelles, G.; Cebollada, A.; Feng, Huanhuan; García‐Martín, Antonio; Meneses-Rodrı́guez, David; Zhao, Jun; Gießen, Harald

doi:10.1021/acsphotonics.5b00158

Cited by 43 publications

(40 citation statements)

References 43 publications

(85 reference statements)

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“…In spectroscopic ellipsometers with PCSA configuration of the optical elements (polarizer, compensator, sample and analyzer), the elements of row 4 of the Mueller matrix (m 41 , m 42 , m 43 and m 44 ) cannot be obtained due to the lack of a second compensator [28]. From symmetry considerations, we have used a valid method based on measurements with sample illumination from the metastructures side (Front-F) or from the substrate side (Back-B) [29,30]. This allows, for example, to discern the different contributions of the system to the circular differential extinction [26,31].…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

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

Dios¹,

Jiménez²,

García³

et al. 2019

Opt. Express

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“…The peak of the CID spectrum is located at a wavelength of 757 nm with a CID value as high as ≈35%, indicating the realization of giant optical activity. While optical activity can, in general, originate from both the optical anisotropy and chirality of nanostructures, for our nanoflower, the giant optical activity comes from its chirality (see Section and Figure S4, Supporting Information, for details).…”

Section: Resultsmentioning

confidence: 99%

Giant Optical Activity in an All‐Dielectric Spiral Nanoflower

Xiao

Cheng

Goda

2018

Small

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Optical activity is an effect of prominent importance in stereochemistry, analytical chemistry, metamaterials, spin photonics, and astrobiology, but is naturally minuscule. Metallic nanostructures are commonly exploited as basic elements for artificially producing large optical activity by virtue of surface plasmon resonance (SPR) on the nanostructures. However, their intrinsic high ohmic loss amplified by the SPR results in low energy efficiency and large photothermal heat generation, severely limiting their performance and practical utility. Giant optical activity by inducing magnetic resonance in an all-dielectric spiral nanoflower (spiral-flower-shaped nanostructure) is demonstrated here. Specifically, a large circular-intensity difference of ≈35% is theoretically predicted and experimentally demonstrated by optimizing the magnetic quadrupole contribution of the nanoflower to scattered light. The nanoflower overcomes the bottleneck of the traditional metallic platforms and enables the development of diverse chiroptical devices and applications.

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“…Interestingly, it is not strictly required that the MO material is part of the resonant antenna itself. It is also possible to enhance the MO response of a continuous (non-resonant) metallic MO film by means of the near field of attached noble metal antennas [148][149][150]. Similarly, for dielectric MO films it has been demonstrated both theoretically [151] and experimentally [152,153] that by incorporating noble metal antennas inside or on top of the surface of the MO film the Faraday effect can be enhanced significantly.…”

Section: Magnetoplasmonic Antennasmentioning

confidence: 98%

“…For example Torrado et al [149] studied magneto-optical effects of localized plasmon resonances interacting with propagating ones resulting in strongly magnetic field dependent SPP dispersion (more discussion on this aspect is provided in section 3.3). Furthermore, Armelles et al [150] investigated the interplay between a continuous Au/Co mulilayer and a chiral plasmonic oligomer leading to an overlay of chirality induced natural circular dichroism (NCD) and magnetic-field induced circular dichroism (MCD). Similarly, in a very recent study Zubritskaya et al [155] demonstraed a metasurface consisting of chiral arrangements of gold and nickel disks which provides magnetically tunable chiroptical response.…”

Section: Magnetoplasmonic Antennasmentioning

confidence: 99%

Nonreciprocal hybrid magnetoplasmonics

Floess

Gießen

2018

Rep. Prog. Phys.

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The Faraday effect describes the phenomenon that a magnetized material can alter the polarization state of transmitted light. Interestingly, unlike most light-matter interactions in nature, it breaks Lorentz reciprocity. This exceptional behavior is utilized for applications such as optical isolators, which are core elements in communication and laser systems. While there is high demand for sub-micron nonreciprocal photonic devices, the realization of such systems is extremely challenging as conventional magneto-optic materials only provide weak magnetooptic response within small volumes. Plasmonics could be a key to overcome this hurdle in the future: over the last years there have been several lines of work demonstrating that different types of metallic nanostrutures can be utilized to greatly enhance the magneto-optic response of conventional materials. In this review we give an overview over the state of the art in the field and highlight recent developments on hybrid plasmonic Faraday rotators. Our discussions are mainly focused on the visible and near-infrared wavelength regions and cover both experimental realizations as well as analytical descriptions. Special attention will be paid to recent developments on hybrid plasmonic thin film systems consisting of gold and europium chalcogenides.

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Interaction Effects between Magnetic and Chiral Building Blocks: A New Route for Tunable Magneto-chiral Plasmonic Structures

Cited by 43 publications

References 43 publications

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

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

Giant Optical Activity in an All‐Dielectric Spiral Nanoflower

Nonreciprocal hybrid magnetoplasmonics

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