Modified and controllable dispersion interaction in a one-dimensional waveguide geometry

Haakh, Harald R.; Scheel, Stefan

doi:10.1103/physreva.91.052707

Cited by 23 publications

(49 citation statements)

References 36 publications

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“…In addition, both the oscillating and monotonous force components are expected to arise in waveguides as recently studied in Refs. [33][34][35][36]. It could be also interesting to generalize our model to include finite temperature, by chancing the fluctuation relations of the electromagnetic field, and to consider many-body vdW forces.…”

Section: Discussionmentioning

confidence: 99%

van der Waals interactions between excited atoms in generic environments

et al. 2016

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We consider the the van der Waals force involving excited atoms in general environments, constituted by magnetodielectric bodies. We develop a dynamical approach studying the dynamics of the atoms and the field, mutually coupled. When only one atom is excited, our dynamical theory suggests that for large distances the van der Waals force acting on the ground-state atom is monotonic, while the force acting in the excited atom is spatially oscillating. We show how this latter force can be related to the known oscillating Casimir-Polder force on an excited atom near a (ground-state) body. Our force also reveals a population-induced dynamics: for times much larger that the atomic lifetime the atoms will decay to their ground-states leading to the van der Waals interaction between ground-state atoms.

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Section: Discussionmentioning

confidence: 99%

van der Waals interactions between excited atoms in generic environments

et al. 2016

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“…Hence if we know the handedness of one chiral molecule we are able to determine the handedness of the other one with this experiment. Note that the recently predicted exponential suppression of the electric vdW potential in a parallel mirror cavity [36] or in a planar waveguide [37] might further assist the observability of the chiral component. Three-body discriminatory chiral contributions are also present in the cavity configuration, however they are smaller with respect to the analyzed two-body contributions.…”

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confidence: 99%

Enhanced Chiral Discriminatory van der Waals Interactions Mediated by Chiral Surfaces

et al. 2017

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We predict a discriminatory interaction between a chiral molecule and an achiral molecule which is mediated by a chiral body. To achieve this, we generalize the van der Waals interaction potential between two ground-state molecules with electric, magnetic and chiral response to non-trivial environments. The force is evaluated using second-order perturbation theory with an effective Hamiltonian. Chiral media enhance or reduce the free interaction via many-body interactions, making it possible to measure the chiral contributions to the van der Waals force with current technology. The van der Waals interaction is discriminatory with respect to enantiomers of different handedness and could be used to separate enantiomers. We also suggest a specific geometric configuration where the electric contribution to the van der Waals interaction is zero, making the chiral component the dominant effect.PACS numbers: 34.20. Cf, 33.55.+b,42.50.Nn Introduction. Casimir and van der Waals (vdW) forces are electromagnetic interactions between neutral macroscopic bodies and/or molecules due to the quantum fluctuations of the electromagnetic field [1][2][3]. In particular, the attractive vdW potential between two electrically polarisable particles was first derived by Casimir and Polder using the minimal-coupling Hamiltonian [2]. Molecules can also exhibit magnetic [4][5][6][7] and chiral polarisabilities [4,8,9] and their contribution to the vdW force can be repulsive.The aim of this work is the study of the interaction between chiral molecules in the presence of a chiral magneto-dielectric body. Chiral molecules lack any center of inversion nor plane of symmetry. Hence they exist as two distinct enantiomers, left-handed and righthanded, which are related to space inversion. Due to their low symmetry they have distinctive interactions with light. In a chiral solution the refractive indices for circularly polarized light of different handedness are different. Hence a chiral solution can rotate the plane of polarization of light with an angle related to the concentration of the solution (optical rotation) [10][11][12], or absorb left-and right-circularly polarised light at different rates (circular dichroism) [13]. All of these phenomena are related to the optical rotatory strength, defined in terms of electric (d nk ) and magnetic (m nk ) dipole moment matrix elements [14]:

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“…Here, interactions are mediated by the guided mode with wave number k = 2π/λ and [40,41] and multiple coherent scattering affects the system properties. For even N and Bragg or anti-Bragg conditions (odd or even 2L/λ ∈ N, respectively), A −1 can be exactly diagonalized by a Fourier ansatz (cf.…”

Section: Collective States Multiple Scattering and A Phase Diagrammentioning

confidence: 99%

Polaritonic normal-mode splitting and light localization in a one-dimensional nanoguide

2016

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We theoretically investigate the interaction of light and a collection of emitters in a subwavelength onedimensional medium (nanoguide), where enhanced emitter-photon coupling leads to efficient multiple scattering of photons. We show that the spectrum of the transmitted light undergoes normal-mode splitting even though no external cavity resonance is employed. By considering densities much higher than those encountered in cold atom experiments, we study the influence of the near-field dipole coupling and disorder on the resulting complex super-radiant and subradiant polaritonic states. In particular, we provide evidence for the longitudinal localization of light in a one-dimensional open system and provide a polaritonic phase diagram. Our results motivate a number of experiments, where new coherent superposition states of light and matter can be realized in the solid state.

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Modified and controllable dispersion interaction in a one-dimensional waveguide geometry

Cited by 23 publications

References 36 publications

van der Waals interactions between excited atoms in generic environments

van der Waals interactions between excited atoms in generic environments

Enhanced Chiral Discriminatory van der Waals Interactions Mediated by Chiral Surfaces

Polaritonic normal-mode splitting and light localization in a one-dimensional nanoguide

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