Mimicking chiral light-matter interaction

Nechayev, Sergey; Banzer, Peter

doi:10.1103/physrevb.99.241101

Cited by 17 publications

(16 citation statements)

References 57 publications

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“…Anomalous unidirectional excitation by an all-electric Huygens metasource in HMMs provides new ways to control EM waves within a near-field regime. Recently, special near-field dipoles, including spin dipoles, 64,65 Huygens dipoles, 66,67 Janus dipoles, 48 and composite spinning dipoles, 68,69 have provided a good platform for studying interesting physical mechanisms such as transverse-spin-associated globally unique handedness, 70 bulk EM waves, 35,71 bound states in continuum, 72 and topological edge states. 73,74 In this section, we demonstrate experimentally that a spin metasource can be used to produce the anomalous PSHE in a hyperbolic waveguide.…”

Section: Unidirectional Excitations Of Hyperbolic Guided Modes Using a Spin Metasourcementioning

confidence: 99%

Anomalous unidirectional excitation of high-k hyperbolic modes using all-electric metasources

et al. 2021

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The unidirectional excitation of near-field optical modes is a fundamental prerequisite for many photonic applications, such as wireless power transfer and information communications. We experimentally construct all-electric Huygens and spin metasources and demonstrate anomalous unidirectional excitation of high-k hyperbolic modes in two types of hyperbolic metasurfaces. We use a Huygens metasource to study the unidirectional excitation of hyperbolic bulk modes in a planar hyperbolic metamaterial (HMM). Specifically, unidirectional excitation is the same as that in free space in the vertical direction, but opposite to that in free space in the horizontal direction. This anomalous unidirectional excitation is determined by the anisotropic HMM dispersion. In addition, we use a spin metasource to observe the anomalous photonic spin Hall effect in a planar hyperbolic waveguide. For a near-field source with a specific spin, the guide mode with a fixed directional wave vector is excited due to spin-momentum locking. Because the directions of momentum and energy flows in the HMM waveguide are opposite, the unidirectional excitation of hyperbolic guided modes is reversed. Our results not only uncover the sophisticated electromagnetic functionalities of metasources in the near-field but may also provide novel opportunities for the development of integrated optical devices.

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Section: Unidirectional Excitations Of Hyperbolic Guided Modes Using a Spin Metasourcementioning

confidence: 99%

Anomalous unidirectional excitation of high-k hyperbolic modes using all-electric metasources

et al. 2021

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“…Secondly, owing to the heterogeneous environment, each of the nanoparticles in the nanotrimer assembly responds differently to the incident field [35]. The latter suggests that such systems can potentially "sense" the gradient of the excitation field and distinguish the topological charge of orbital angular momentum of incident beams [59,60], paving the way towards novel nanoscopic sensors and sorters.…”

Section: Discussionmentioning

confidence: 99%

Substrate-Induced Chirality in an Individual Nanostructure

et al. 2019

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We experimentally investigate the chiral optical response of an individual nanostructure consisting of three equally sized spherical nanoparticles made of different materials and arranged in 90 • bent geometry. Placing the nanostructure on a substrate converts its morphology from achiral to chiral. Chirality leads to pronounced differential extinction, i.e., circular dichroism and optical rotation, or equivalently, circular birefringence, which would be strictly forbidden in the absence of a substrate or heterogeneity. This first experimental observation of the substrate-induced break of symmetry in an individual heterogeneous nanostructure sheds new light on chiral light-matter interactions at substrate-nanostructure interfaces.

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“…Like with energy detection, the measurement of helicity W D H of the wavefield emitted by D is affected by the transfer rate of helicity W DA H to A. That quantity W D H may be observed by ellipsometric measurements through the Stokes parameter S 3 of the field E D emitted by D [29,72], which with reference to the paragraph below Eq. (26) and the notation of Eqs.…”

Section: Transfer Of Helicitymentioning

confidence: 99%

Fundamentals and model of resonance helicity and energy transfer between two magnetoelectric chiral particles

Nieto‐Vesperinas

2019

Phys. Rev. A

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We establish a classical electrodynamic theory for the non-radiative transfer of field helicity (RHELT) and energy (RET) between a donor and an acceptor, both being dipolar, magnetoelectric and bi-isotropic, chiral in particular, with rotating excited dipoles. We introduce orientational factors that control this process. Also, a RHELT and RET interaction radius is put forward. The detection of RHELT adds a wealth of information contained in the helicity of the transferred fields, never used or established to date. The nature of these dipolar magnetoelectric bi-isotropic particles and/or molecules with induced dipoles possessing angular momentum, enriches the number of variables and associated effects. Hence the landscape involved in this transfer phenomenon, never explored before, is significantly broader than in conventional FRET. In this way, chiral interacting objects convey terms in the equations of transfer rate of helicity and energy that are discriminatory, so that one can extract information on their structural chirality handedness and polarization rotation. As such, not only the rate of electromagnetic helicity transfer, but also that of energy transfer may be negative, which for the latter means an enhanced emission from the donor in pressence of acceptor, a phenomenon which does not exist in conventional FRET. Importantly, both the RHELT and RET rates, as well as the RHELT interaction radius, are very sensitive to changes in the helicity, or state of polarization, of the illumination, as well as to the polarization of the excited electric and magnetic dipole moments of donor and acceptor. Finally, we introduce the observable quanties in terms of which one can obtain the transfer rates and interaction radii.

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Mimicking chiral light-matter interaction

Cited by 17 publications

References 57 publications

Anomalous unidirectional excitation of high-k hyperbolic modes using all-electric metasources

Anomalous unidirectional excitation of high-k hyperbolic modes using all-electric metasources

Substrate-Induced Chirality in an Individual Nanostructure

Fundamentals and model of resonance helicity and energy transfer between two magnetoelectric chiral particles

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