Controlling electric, magnetic, and chiral dipolar emission with PT-symmetric potentials

Alaeian, Hadiseh; Dionne, Jennifer A.

doi:10.1103/physrevb.91.245108

Cited by 31 publications

(18 citation statements)

References 38 publications

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“…The chiral Purcell factor has also been proposed for characterizing the ability of optical resonators to enhance chiroptical signals [168]. In [169], the effect of parity-time symmetric potentials on the radiation of chiral dipole sources has been theoretically investigated. Through appropriate design of parity-time symmetric potentials, chiral quantum emitters can be distinguished by their decay rates.…”

Section: Chiral Light-matter Interactionsmentioning

confidence: 99%

Optical chiral metamaterials: a review of the fundamentals, fabrication methods and applications

et al. 2016

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Optical chiral metamaterials have recently attracted considerable attention because they offer new and exciting opportunities for fundamental research and practical applications. Through pragmatic designs, the chiroptical response of chiral metamaterials can be several orders of magnitude higher than that of natural chiral materials. Meanwhile, the local chiral fields can be enhanced by plasmonic resonances to drive a wide range of physical and chemical processes in both linear and nonlinear regimes. In this review, we will discuss the fundamental principles of chiral metamaterials, various optical chiral metamaterials realized by different nanofabrication approaches, and the applications and future prospects of this emerging field.

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Section: Chiral Light-matter Interactionsmentioning

confidence: 99%

Optical chiral metamaterials: a review of the fundamentals, fabrication methods and applications

et al. 2016

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“…To further show the origin and the variation of the chirality in designed two-layer metasurfaces, we gave the dipolar analysis for the designed two-layer metasurfaces. Similar to natural chiral molecules, the specific combination of the electric and magnetic responses along the same direction, that is, parallel or antiparallel orientations with comparable magnitude, can induce strong chiral response 25 , 26 . A right-handed enantiomer refers to the one whose components of effective electric and magnetic dipoles in the same direction are parallel orientation, while a left-handed enantiomer refers to the one whose components of effective electric and magnetic dipoles in the same direction are antiparallel orientation.…”

Section: Resultsmentioning

confidence: 99%

Spin-Selective Transmission and Devisable Chirality in Two-Layer Metasurfaces

Liu

Cheng

et al. 2017

Sci Rep

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Chirality is a nearly ubiquitous natural phenomenon. Its minute presence in most naturally occurring materials makes it incredibly difficult to detect. Recent advances in metasurfaces indicate that they exhibit devisable chirality in novel forms; this finding offers an effective opening for studying chirality and its features in such nanostructures. These metasurfaces display vast possibilities for highly sensitive chirality discrimination in biological and chemical systems. Here, we show that two-layer metasurfaces based on twisted nanorods can generate giant spin-selective transmission and support engineered chirality in the near-infrared region. Two designed metasurfaces with opposite spin-selective transmission are proposed for treatment as enantiomers and can be used widely for spin selection and enhanced chiral sensing. Specifically, we demonstrate that the chirality in these proposed metasurfaces can be adjusted effectively by simply changing the orientation angle between the twisted nanorods. Our results offer simple and straightforward rules for chirality engineering in metasurfaces and suggest intriguing possibilities for the applications of such metasurfaces in spin optics and chiral sensing.

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“…Metallic nanostructures with engineered optical properties constitute a new platform to tailor light-matter interactions on active materials [12]. Optical nanostructures with hybrid active-passive geometries rely on the balance between gain and loss [13,14] and active-passive nanostructures shed light on important non-Hermitian quantum mechanics.…”

Section: Introductionmentioning

confidence: 99%

Forward and Backward Unidirectional Scattering by the Core-Shell Nanocube Dimer with Balanced Gain and Loss

Zhang

et al. 2020

Nanomaterials

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An optical nanoantenna consisting of a Au-dielectric core-shell nanocube dimer with switchable directionality was designed and described. Our theoretical model and numerical simulation showed that switching between forward and backward directions can be achieved with balanced gain and loss, using a single element by changing the coefficient κ in the core, which can be defined by the relative phase of the polarizability. The optical response indicated a remarkable dependence on the coefficient κ in the core as well as frequency. The location of the electric field enhancement was specified by the different coefficient κ and, furthermore, the chained optical nanoantenna and coupled electric dipole emitted to the optical nanoantenna played significant roles in unidirectional scattering. This simple method to calculate the feasibility of unidirectional and switchable scattering provides an effective strategy to explore the functionalities of nanophotonic devices.

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Controlling electric, magnetic, and chiral dipolar emission with PT-symmetric potentials

Cited by 31 publications

References 38 publications

Optical chiral metamaterials: a review of the fundamentals, fabrication methods and applications

Optical chiral metamaterials: a review of the fundamentals, fabrication methods and applications

Spin-Selective Transmission and Devisable Chirality in Two-Layer Metasurfaces

Forward and Backward Unidirectional Scattering by the Core-Shell Nanocube Dimer with Balanced Gain and Loss

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