Dispersion engineering in unidirectional excitation of the surface wave of photonic crystal

Hu, Jinbing; Tian, Shengnan; Yang, Yizhou; Zhuang, Songlin; Guo, Hanming

doi:10.1364/ol.43.005319

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…For the general case, however, the intensity of the guided mode is directly proportional to the intensity of the source (cosθ for H x and sinθ for H y ) and the phase difference can be linked to the polarization phase factor of the source e iϕ . Therefore, we may express the two the coefficient functions as follows: u(x, y) = cosθ cosθ 0 w(x, y), v(x, y) = sinθ sinθ 0 e i(ϕ−ϕ0) w(x, y) (6) where θ 0 and ϕ 0 are the optimal values for the unidirectionalleft case.…”

Section: Discussion Based On Cwi Theorymentioning

confidence: 99%

“…[1][2][3]. The effect has been named as photonic spin Hall effect (PSHE) and was later confirmed by experiments designed in different systems [4][5][6][7]. With its ideal property of unidirectional transmission, PSHE possesses great application prospects in optical communication, micro-scale optical devices, integrated optical chips, etc [8][9][10].…”

Section: Introductionmentioning

confidence: 91%

“…As the basic concepts of PSHE have been developed from the electron QSHE, most of the previous studies are also restricted on the analogy of QSHE. The experimental works concentrated on the surface or interface systems including the surface plasmon polariton (SPP) [4,13,17] and spoof SPP [18] , the surface states of photonic crystals (PCs) [6,13], the optical gratings at the dielectric interfaces [7], the metasurfaces [10] etc. These optical surface modes generally involve two photonic edge states, corresponding to the left and right directions respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photonic spin Hall effect with high coupling efficiency in the combined structure of periodic dielectric waveguides and photonic crystal waveguide

Zhang

Zhao

Zhou

2023

J. Opt.

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In this paper, we discuss the Photonic Spin Hall Effect (PSHE) in the combined structure of Periodic Dielectric Waveguides (PDWs) and Photonic Crystal Waveguide (PCW). By controlling the polarization of the dipole source, we have successfully achieved the arbitrary manipulation of PSHE for the PDW guided mode in our structure. The advantage of PDW is that it can be designed to different shapes without the geometric constraints, and still maintains a relatively high transmission rate. Therefore, by further changing the structure, including the adjustment of the intersection angle between PDW and PCW, and the alteration of the straight PDW to the bending or bifurcated shapes, we find that the output of highly unidirectional PSHE is mainly determined by the intersection angle between PDW and PCW and almost independent of the detailed shape of PDW.

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Section: Discussion Based On Cwi Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Photonic spin Hall effect with high coupling efficiency in the combined structure of periodic dielectric waveguides and photonic crystal waveguide

Zhang

Zhao

Zhou

2023

J. Opt.

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“…The spin Hall effect (SHE) of light [5][6][7] originates from the spin-orbit coupling, which provides an effective way to control the spatial distribution and propagation path of light. In the last decade, various methods have been presented to realize the spin manipulation of light based on the SHE of light such as nanostructures [2,[8][9][10], optical waveguides [3,[11][12][13][14][15][16][17], metamaterials [11][12][13][14][18][19][20][21][22][23][24], metasurfaces [7,[25][26][27][28][29][30], and optical interfaces [6,[31][32][33][34][35]. The SHE refers to the procedure where the spin state of light couples to the orbit of the output light.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional excitation of waveguide mode by optical spin–orbit couplings with on-chip nanoantenna array

Liu

Gao

et al. 2019

J. Phys. D: Appl. Phys.

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Gratings are commonly used as waveguide couplers because they can provide extra momentum to assist the incident light beam to match the wave vector in the waveguides. Here, we propose two kinds of grating-like nanoantenna arrays which not only satisfies the wavevector matching condition, but also induces the conversion from the spin angular momentum to orbital angular momentum. We realize the polarization-dependent unidirectional propagations of TE0-like and TE1-like modes in a silicon-on-insulator waveguide with on-chip nanoantenna array. In addition, the maximum contrast ratio between the forward and backward transmittances is higher than 30 dB and the unidirectional optical power propagation with large coupled mode purity can be achieved. The method and the results presented in this paper might provide practical guidelines for the further development of polarization sorters, switchers, quantum information and processing.

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“…The surface waves in photonic crystal (PC) are the Bloch surface waves composed of zero order and higher order surface modes. In recent years, PSHE can be observed in two-dimensional (2D) PC 23 , and an open cavity was regarded as a scatterer. As we all know, an electric dipolar source or magnetic dipolar source can be realized experimentally by illuminating any small scatterer 10 , 24 , therefore, the scattering of scatterer is equivalent to the radiation of the dipole source.…”

mentioning

confidence: 99%

Unidirectional propagation of the Bloch surface wave excited by the spinning magnetic dipole in two-dimensional photonic crystal slab

Zhao

Zhou

2021

Sci Rep

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The photonic spin Hall effect (PSHE) can be realized in a photonic crystal (PC) slab, that is, the unidirectional Bloch surface wave can propagate along the surface of the PC slab under the excitation of elliptical polarized magnetic dipole. It is further proved that PSHE is caused by the interference of the component surface waves excited by the different components of the incident light, which is the so called component wave interference (CWI) theory. In addition, we also find that the spin of the surface wave oscillates periodically in space, and the oscillation period is a unit cell. In a unit cell, the average spin keeps the spin orbit locked. The results show that the spin separation can also be modulated by the position and the polarization state of the magnetic dipole.

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Dispersion engineering in unidirectional excitation of the surface wave of photonic crystal

Cited by 8 publications

References 22 publications

Photonic spin Hall effect with high coupling efficiency in the combined structure of periodic dielectric waveguides and photonic crystal waveguide

Photonic spin Hall effect with high coupling efficiency in the combined structure of periodic dielectric waveguides and photonic crystal waveguide

Unidirectional excitation of waveguide mode by optical spin–orbit couplings with on-chip nanoantenna array

Unidirectional propagation of the Bloch surface wave excited by the spinning magnetic dipole in two-dimensional photonic crystal slab

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