A Compound Phase-Modulated Beam Splitter to Distinguish Both Spin and Orbital Angular Momentum

Zhao, Xuesi; Feng, Xue; Liu, Fang; Cui, Kaiyu; Zhang, Wei; Huang, Yidong

doi:10.1021/acsphotonics.9b01437

Cited by 27 publications

(26 citation statements)

References 70 publications

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“…Thus, we observe the desired phenomenon of spin-orbit coupling. However, in contrast to many works on surface plasmon polaritons [27][28][29][30][31][32][33][34][35] we have two modes of different polarizations that behave differently as well. In order to explain the considered phenomena, we build a toy model in Appendix B.…”

Section: Example: Routing Plasmonic Metasurfacementioning

confidence: 61%

Nanoparticle lattices with bases: Fourier modal method and dipole approximation

2020

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The utilization of periodic structures such as photonic crystals and metasurfaces is common for light manipulation at nanoscales. One of the most widely used computational approaches to consider them and design effective optical devices is the Fourier modal method (FMM) based on Fourier decomposition of electromagnetic fields. Nevertheless, calculating of periodic structures with small inclusions is often a difficult task, since they induce lots of high-k harmonics that should be taken into account. In this paper, we consider small particle lattices with bases and construct their scattering matrices via discrete dipole approximation (DDA). Afterwards, these matrices are implemented in FMM for consideration of complicated layered structures. We show the performance of the proposed hybrid approach by its application to a lattice, which routes left and right circularly polarized incident light to guided modes propagating in opposite directions. We also demonstrate its precision by spectra comparison with finite element method (FEM) calculations. The high speed and precision of this approach enable the calculation of angle-dependent spectra with very high resolution in a reasonable time, which allows resolving narrow lines unobservable by other methods.

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Section: Example: Routing Plasmonic Metasurfacementioning

confidence: 61%

Nanoparticle lattices with bases: Fourier modal method and dipole approximation

2020

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“…To achieve the high level of efficiency apodized (gradient) gratings are applied [12-15, 18-20, 23, 24] as well as some structures of advanced designs [16][17][18][19][20]. The most useful gratings not only provide the in/out-coupling interface but offer an additional functionality such as polarization/orbital angular momentum splitting [22,23,[25][26][27], beam focusing via concentric gratings [7,[28][29][30], * Ilia.Fradkin@skoltech.ru biosensing [31,32], integration with hyperbolic metamaterials [33,34], etc [35]. Nevertheless, in many case the systems are rather complicated in operation and fabrication.…”

Section: Introductionmentioning

confidence: 99%

“…This study was followed up by a number of applications of similar structures for the so-called photonic spin-orbit coupling [55,56]. Most of them were also based on surface plasmons [26,[57][58][59][60][61][62][63][64][65][66][67][68][69][70][71], although the same principle is valid for dielectric waveguides as well [72,73]. Remarkably, the dielectric structures schemes attracted much less attention in this context, although they are much more widely spear in practice.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic grating for circularly-polarized out-coupling of waveguide-enhanced spontaneous emission

Fradkin¹,

Demenev²,

Kulakovskiǐ³

et al. 2022

Preprint

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Plasmonic metasurfaces form a convenient platform for light manipulation at the nanoscale due to their specific localized surface plasmons. Nevertheless, despite the high degree of light localization in metals, their intrinsic Joule losses are often considered prevention from applications in high-quality dielectric structures. Here, we experimentally demonstrate that in some cases, the capabilities of plasmonic particles for light manipulation prevail over the negative impact of absorption. We show the lattice of plasmonic nanoparticles onto a dielectric waveguide that efficiently couples the light of both circular polarizations to guided modes propagating in opposite directions. We demonstrate 80% degree of circular polarization for the out-coupled emission of GaAs-waveguide-embedded quantum dots. The results allow us to consider the lattice as a circular-polarization-controlled grating coupler operating at normal incidence and make this structure prospective for further implementation as an efficient coupling interface for various integrated devices.

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“…PBOEs are a kind of optical elements for wavefront shaping based on the PB phase, which is a geometric phase imposed by polarization conversion in contrast to a propagation phase [14,15]. Typical PBOEs include liquid-crystal devices [16] based on anisotropic-material birefringence and metallic or dielectric metasurfaces [17,18] based on structurally effective birefringence, among which the PB dielectric metasurfaces are especially promising to form the PBOEs due to the advantages of simplified fabrication, high efficiency and strong manipulation of light.…”

Section: Introductionmentioning

confidence: 99%

Sorting full angular momentum states with Pancharatnam-Berry metasurfaces based on spiral transformation

Wang¹,

Yan²,

Zhu³

et al. 2020

Opt. Express

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Full angular momentum states constitute a complete and higher state space of a photon, which are significant not only for fundamental study of light but also for practical applications utilizing cylindrical optics such as optical fibers. Here we propose and demonstrate a simple yet effective scheme of combining the spiral transformation with Pancharatnam-Berry (PB) metasurfaces for high-resolution sorting of full angular momentum states. The scheme is verified by successfully sorting full angular momentum states with 7 orbital angular momentum states and 2 spin angular momentum states via numerical simulations and experiments. We expect that our work paves the way for simple high-resolution sorting of full angular momentum states, which could be highly useful in both classical and quantum information systems.

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A Compound Phase-Modulated Beam Splitter to Distinguish Both Spin and Orbital Angular Momentum

Cited by 27 publications

References 70 publications

Nanoparticle lattices with bases: Fourier modal method and dipole approximation

Nanoparticle lattices with bases: Fourier modal method and dipole approximation

Plasmonic grating for circularly-polarized out-coupling of waveguide-enhanced spontaneous emission

Sorting full angular momentum states with Pancharatnam-Berry metasurfaces based on spiral transformation

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