Universal spin-momentum locking of evanescent waves

Mechelen, Todd Van; Jacob, Zubin

doi:10.1364/cleo_qels.2016.fw1d.6

Cited by 37 publications

(46 citation statements)

References 24 publications

(48 reference statements)

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“…The evanescent field may also contain a significant transverse spin component, J trans , which appears due to interaction between the real, Re(k), and imaginary, Im(k), parts of the wave vector, k, at the interface between two different media [32]. Interestingly, Re(k), Im(k), and J trans must form a righthanded system [33]. As a result, the direction of J trans defines the direction of the propagating wave [30,34].…”

Section: Crossed-nanofiber Directional Couplermentioning

confidence: 99%

Complete Polarization Control for a Nanofiber Waveguide Using Directional Coupling

et al. 2019

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Optical nanofiber waveguides are widely used for near-field delivery and measurement of light. Despite their versatility and efficiency, nanofibers have a critical drawback -their inability to maintain light's polarization state on propagation. Here, we design a directional coupler consisting of two crossed nanofibers to probe the polarization state at the waist region. Directionality of coupling occurs due to asymmetric dipolar emission or spin-locking when the evanescent field pattern breaks the mirror symmetry of the crossed-nanofiber system. We demonstrate that, by monitoring the outputs from the directional coupler, two non-orthogonal polarization states can be prepared at the nanofiber waist with a fidelity higher than 99%. Based on these states, we devise a simple and reliable method for complete control of the polarization along a nanofiber waveguide.

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Section: Crossed-nanofiber Directional Couplermentioning

confidence: 99%

Complete Polarization Control for a Nanofiber Waveguide Using Directional Coupling

et al. 2019

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“…In nanophotonics, evanescent waves play a dominant role [1]. Recent awareness of their interesting properties has spurred huge interest: evanescent fields were recently found to have a transverse spin [2][3][4][5], and to exhibit spin-momentum locking [6][7][8][9], leading to a myriad of practical applications in light nano-routing, quantum optics, nonreciprocal devices, optical forces and polarimetry [10][11][12][13][14][15][16][17]. Beyond electromagnetism, evanescent waves have now been found to exhibit analogous properties in other wave fields, such as acoustics [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Evanescent gravitational waves

2020

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We describe the properties of evanescent gravitational waves (EGWs)-wave solutions of Einstein equations which decay exponentially in some direction while propagating in another. Evanescent waves are well known in acoustics and optics and have recently received much attention due to their extraordinary properties such as their transverse spin and spin-momentum locking. We show that EGWs possess similarly remarkable properties, carrying transverse spin angular momenta and driving freely falling test masses along in elliptical trajectories. Hence, test masses on a plane transverse to the direction of propagation exhibit vector and scalar-like deformation, complicating efforts to use detection of such modes as evidence for modified gravity. We demonstrate that EGWs are present and dominant in the vicinity of sub-wavelength sources such as orbiting binaries.

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“…Another interesting case in which concepts initially developed in plasmonics can be exploited in silicon photonic nanoantennas is the novel idea of evanescent wave spin-controlled directional guiding [41,43,[79][80][81][82]. This is based on the existence of a large longitudinal component of the electric field of the guided mode, which is antisymmetric with respect to one of the planes bisecting the waveguide (see Fig.…”

Section: Dielectric and Metallic Nanoantennas On Silicon Photonicsmentioning

confidence: 99%

Exploiting metamaterials, plasmonics and nanoantennas concepts in silicon photonics

Rodríguez-Fortuño

Espinosa-Soria

Martı́nez

2016

J. Opt.

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The interaction of light with subwavelength metallic nano-structures is at the heart of different current scientific hot topics, namely plasmonics, metamaterials and nanoantennas. Research in these disciplines during the last decade has given rise to new, powerful concepts providing an unprecedented degree of control over light manipulation at the nanoscale. However, only recently have these concepts been used to increase the capabilities of light processing in current photonic integrated circuits (PICs), which traditionally rely only on dielectric materials with element sizes larger than the light wavelength. Amongst the different PIC platforms, silicon photonics is expected to become mainstream, since manufacturing using well-established CMOS processes enables the mass production of low-cost PICs. In this review we discuss the benefits of introducing recent concepts arisen from the fields of metamaterials, plasmonics and nanoantennas into a silicon photonics integrated platform. We review existing works in this direction and discuss how this hybrid approach can lead to the improvement of current PICs enabling novel and disruptive applications in photonics.

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Universal spin-momentum locking of evanescent waves

Cited by 37 publications

References 24 publications

Complete Polarization Control for a Nanofiber Waveguide Using Directional Coupling

Complete Polarization Control for a Nanofiber Waveguide Using Directional Coupling

Evanescent gravitational waves

Exploiting metamaterials, plasmonics and nanoantennas concepts in silicon photonics

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