Transverse Spin and Spin-Orbit Coupling in Silicon Waveguides

Espinosa-Soria, Alba; Martı́nez, Alejandro

doi:10.1109/lpt.2016.2553841

Cited by 53 publications

(56 citation statements)

References 31 publications

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“…We start with a very brief overview of the mode-coupling explanation of directional scattering of circularly polarized dipoles [4][5][6][7][8][9]. Consider a dipolar emitter located in r 0 close to a waveguide interface (outside or inside the waveguide).…”

Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

“…The probability that photons emitted by the source couple to a certain waveguide mode is proportional to the square modulus of the coupling amplitude between the dipole moments and the mode fields in the waveguide [3][4][5],…”

Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

“…It can be verified that there are positions at which the modes of a waveguide display circularly (or, more generally, elliptically) polarized fields with a handedness that depends on the propagation direction. These positions can either lie inside the waveguide [6][7][8] or be in its close proximity, in the regions of evanescent tails that surround it [3][4][5]9,35]. Hence, it follows that circularly (or elliptically) polarized dipoles with opposite handedness will couple into opposite propagating directions of the modes, while linearly polarized dipoles will excite them equally in both directions [9].…”

Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

“…The nanophotonics and quantum optics communities have recently shown strong interest in the fascinating scenario of a photonic waveguide being excited by a circularly polarized electric dipole source showing strong directionality [1][2][3][4][5][6][7][8]. The practical importance of the unidirectional excitation by circularly polarized dipoles is evident in quantum optics, as it provides a means of mapping quantum spin states into different free-photon states [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…A very general and simple one relies on the fact that the coupling strength of a dipole to any photonic mode is proportional to the similarity between the electric dipole vector p and the electric field vector of the photonic mode at the location of the dipole E(r 0 ). Therefore, the dipole can be made to match the fields of the mode propagating in one direction but not the opposite one [3][4][5][6][7][8][9]. This line of thought can be equally well applied to * Corresponding author: michela.picardi@kcl.ac.uk magnetic dipoles [5,7].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Unidirectional evanescent-wave coupling from circularly polarized electric and magnetic dipoles: An angular spectrum approach

et al. 2017

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Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

Section: Mode Coupling and Spin-direction Lockingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unidirectional evanescent-wave coupling from circularly polarized electric and magnetic dipoles: An angular spectrum approach

et al. 2017

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Spin‐Selective and Wavelength‐Selective Demultiplexing Based on Waveguide‐Integrated All‐Dielectric Metasurfaces

Zhang

Liu

et al. 2019

Advanced Optical Materials

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A novel approach for the design of a spin‐selective directional coupler and spin‐selective wavelength demultiplexing device by integrating an all‐dielectric metasurface into a silicon nitride waveguide is proposed and demonstrated. Taking advantage of the intrinsic chirality of the electromagnetic field inside the waveguide, the propagation direction of the excited waveguide mode can be easily controlled by the spin and wavelength of the incident light. The coupling efficiency of the spin‐selective directional coupler toward one side can reach ≈51.6% at 1836 nm. In addition, the working wavelengths, coupling efficiency, peak width, and mode type can be easily tailored by adjusting the geometric parameters of the waveguide and the antenna arrays. This study may provide a further step in the development of photonic integrated circuits, integrated quantum optics, chiral optics, and high‐bit‐rate telecommunication applications.

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Toward Chiral Sensing and Spectroscopy Enabled by All‐Dielectric Integrated Photonic Waveguides

Vázquez‐Lozano

Martı́nez

2020

Laser & Photonics Reviews

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Chiral spectroscopy is a powerful technique enabling to identify optically the chirality of matter. So far, most experiments to check the chirality of matter or nanostructures have been performed through arrangements wherein both the optical excitation and detection are realized via circularly polarized light propagating in free space. However, for the sake of miniaturization, it would be desirable to perform chiral spectroscopy in photonic integrated platforms, with the additional benefit of massive parallel detection, low‐cost production, repeatability, and portability. Here it is shown that all‐dielectric photonic waveguides can support chiral modes under proper combination of fundamental eigenmodes. Two mainstream configurations are investigated: a dielectric wire with square cross section and a slotted waveguide. Three different scenarios in which such waveguides could be used for chiral detection are numerically analyzed: waveguides as near‐field probes, evanescent‐induced chiral fields, and chiroptical interaction in void slots. In all the cases, a metallic nanohelix is considered as a chiral probe, though all the approaches can be extended to other kinds of chiral nanostructures as well as matter. These results establish that chiral applications such as sensing and spectroscopy could be realized in standard integrated optics, in particular, with silicon‐based technology.

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Transverse Spin and Spin-Orbit Coupling in Silicon Waveguides

Cited by 53 publications

References 31 publications

Unidirectional evanescent-wave coupling from circularly polarized electric and magnetic dipoles: An angular spectrum approach

Unidirectional evanescent-wave coupling from circularly polarized electric and magnetic dipoles: An angular spectrum approach

Spin‐Selective and Wavelength‐Selective Demultiplexing Based on Waveguide‐Integrated All‐Dielectric Metasurfaces

Toward Chiral Sensing and Spectroscopy Enabled by All‐Dielectric Integrated Photonic Waveguides

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