Photonic measures of helicity: optical vortices and circularly polarized reflection

Coles, Matthew; Andrews, Davıd L.

doi:10.1364/ol.38.000869

Cited by 20 publications

(25 citation statements)

References 17 publications

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“…This might be achieved, for example, by best-fitting the dispersion curve to a suitable line-shape function, running the residuals into a log-log plot against wavelength, and recognizing a -4 gradient. A similar effect could also, in principle, arise spate of publications [28][29][30][31] has shown, curious anomalies can arise with circularly polarized light, in the vicinity of a mirror upon which it has normal incidence. As a result of the superposition of forward and backward propagating light, the relative strengths of the electric and magnetic fields are then found to vary over distance, within the space of a wavelength.…”

Section: Discussionmentioning

confidence: 84%

Identifying diamagnetic interactions in scattering and nonlinear optics

Forbes

Andrews

2016

Phys. Rev. A

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In the generic formulation of optical interactions there is, beyond the familiar electric and magnetic multipolar forms of coupling, an additional diamagnetization term that rarely receives attention. In fact it can give rise to effects that should be observable in the general context of nonlinear optical spectroscopy, as well as scattering. A quantum electrodynamical analysis reveals features of special interest in two specific cases: two-photon absorption and Rayleigh scattering. Diamagnetic contributions are seen to be dispersion free with regards to the frequency of input radiation, and can represent unique interactions within optical absorption and emission processes. There is also a configuration in which diamagnetic couplings, which are quadratic in the magnetic field, can supersede those that are dependent linearly on the electric field strength, such as the electric dipole. In this connection the influence of retroreflected circularly polarized light, which leads to a local distance dependence in magnitude of the electromagnetic fields, produces conditions in which the diamagnetization response can become a prominent feature in two-photon absorption.

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Section: Discussionmentioning

confidence: 84%

Identifying diamagnetic interactions in scattering and nonlinear optics

Forbes

Andrews

2016

Phys. Rev. A

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“…57,58 It is interesting to note that other aspects of photophysics being markedly modified in the proximity of a mirror have also recently received attention in connection with chiral species and circular polarisations. [59][60][61][62] Summarizing, the ensuing results demonstrated the possibility of altering the strength of the resonance energy transfer between two nanoparticles by careful engineering of the spacing and inclusion of an ideal quantum mirror in the vicinity. Therefore, the analysis demonstrates a mechanism to inhibit or markedly enhance the transfer of energy between discrete components, potentially in any multi-quantum dot/nanowire system, inviting surface and layer applications.…”

Section: Discussionmentioning

confidence: 91%

Controlling resonance energy transfer in nanostructure emitters by positioning near a mirror

Weeraddana

Premaratne

Gunapala

et al. 2017

The Journal of Chemical Physics

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The ability to control light-matter interactions in quantum objects opens up many avenues for new applications. We look at this issue within a fully quantized framework using a fundamental theory to describe mirror-assisted resonance energy transfer (RET) in nanostructures. The process of RET communicates electronic excitation between suitably disposed donor and acceptor particles in close proximity, activated by the initial excitation of the donor. Here, we demonstrate that the energy transfer rate can be significantly controlled by careful positioning of the RET emitters near a mirror. The results deliver equations that elicit new insights into the associated modification of virtual photon behavior, based on the quantum nature of light. In particular, our results indicate that energy transfer efficiency in nanostructures can be explicitly expedited or suppressed by a suitably positioned neighboring mirror, depending on the relative spacing and the dimensionality of the nanostructure. Interestingly, the resonance energy transfer between emitters is observed to "switch off" abruptly under suitable conditions of the RET system. This allows one to quantitatively control RET systems in a new way.

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“…Surprising effects also arise in optically very simple optical systems. One striking instance, illustrated in figure 4, occurs in the proximity of a mirror, when circularly polarized light impinges at normal incidence; it has been shown that the self-interference of reflected photons produces electromagnetic field distributions with a capacity to produce chiroptical interactions on a locally anomalous scale [9,32,33]. In addition to all of these features, novel experimental effects can also arise over the physical scale represented by the cross-section of a structured beam, as will emerge in later sections.…”

Section: Structure and Scalementioning

confidence: 99%

Quantum formulation for nanoscale optical and material chirality: symmetry issues, space and time parity, and observables

Andrews

2018

J. Opt.

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To properly represent the interplay and coupling of optical and material chirality at the photonmolecule or photon-nanoparticle level invites a recognition of quantum facets in the fundamental aspects and mechanisms of light-matter interaction. It is therefore appropriate to cast theory in a general quantum form, one that is applicable to both linear and nonlinear optics as well as various forms of chiroptical interaction including chiral optomechanics. Such a framework, fully accounting for both radiation and matter in quantum terms, facilitates the scrutiny and identification of key issues concerning spatial and temporal parity, scale, dissipation and measurement. Furthermore it fully provides for describing the interactions of structured or twisted light beams with a vortex character, and it leads to the complete identification of symmetry conditions for materials to provide for chiral discrimination. Quantum considerations also lend a distinctive perspective to the very different senses in which other aspects of chirality are recognized in metamaterials. Duly attending to the symmetry principles governing allowed or disallowed forms of chiral discrimination supports an objective appraisal of the experimental possibilities and developing applications.

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Photonic measures of helicity: optical vortices and circularly polarized reflection

Cited by 20 publications

References 17 publications

Identifying diamagnetic interactions in scattering and nonlinear optics

Identifying diamagnetic interactions in scattering and nonlinear optics

Controlling resonance energy transfer in nanostructure emitters by positioning near a mirror

Quantum formulation for nanoscale optical and material chirality: symmetry issues, space and time parity, and observables

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