Enhancement and modulation of photonic spin Hall effect by defect modes in photonic crystals with graphene

Li, Jie; Tang, Tingting; Luo, Li; Yao, Jianquan

doi:10.1016/j.carbon.2018.03.094

Cited by 55 publications

(18 citation statements)

References 49 publications

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“…This unique feature of the PCs can lead to many potential applications in photonics, including optical reflectors [4], [5], localization of photon [6], suppression of spontaneous emission [7], [8], fabrication of PC waveguides [9], [10], etc. Introducing a defect layer into a PC can result in the appearance of a localized defect mode within the PBG, which enhances the applications proposed for PCs [11]- [15].…”

Section: Introductionmentioning

confidence: 92%

Broadband Terahertz Polarizing Beam Splitter Based on a Graphene-Based Defective One-Dimensional Photonic Crystal

2019

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Seeking operative terahertz (THz) devices has always stimulated considerable attention. Of particular interest is the THz beam splitter. Here, a tunable THz polarizing beam splitter (PBS) is proposed based on a graphene-embedded quarter-wave stack with a central defect layer of air. The spectral performance of the structure is investigated by the transfer matrix method. It is found that the electromagnetic waves can be decomposed into two separate polarized waves at incident angles greater than the critical angle. Furthermore, it is shown that a new kind of Brewster angle is found at the low THz frequencies due to the existence of the graphene nano-layers. The appearance of this angle which we call it the graphene induced Brewster angle results in the separation of TM-and TE-polarized waves at the low THz frequencies (f < 2 THz) in addition to the high THz region. It is shown that the working frequency range of PBS can be easily tuned by adjusting the width of the defect layer of air and also by tuning the chemical potential of graphene nano-layers via a gate voltage. The analysis of the proposed PBS is confirmed by the Finite Element Method (FEM) simulations that were performed with the commercial software COMSOL 5.2. Our investigations also reveal that the high transmission extinction ratio (> 200 dB) for TM waves with frequency f < 2 THz is achieved by increasing the chemical potential to 0.5 eV. Moreover, this structure can exhibit extremely high extinction ratio for TE waves with high THz frequencies. Finally, the degree of polarization equals to one is reported for the PBS proposed here. This structure offers the opportunity to realize a high-efficiency PBS with very high extinction ratios at the broadband THz frequency.

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Section: Introductionmentioning

confidence: 92%

Broadband Terahertz Polarizing Beam Splitter Based on a Graphene-Based Defective One-Dimensional Photonic Crystal

2019

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“…[ 5 ] The centroid of a light beam could generate a displacement, in an incident plane or in a direction perpendicular to it, are called the Goos−Hänchen (GH) and Imbert−Fedorov (IF) displacement, respectively. [ 6–13 ] Various new structures have been proposed to enhance the beam displacements. [ 14,15 ]…”

Section: Introductionmentioning

confidence: 99%

“…[5] The centroid of a light beam could generate a displacement, in an incident plane or in a direction perpendicular to it, are called the GoosÀHänchen (GH) and ImbertÀFedorov (IF) displacement, respectively. [6][7][8][9][10][11][12][13] Various new structures have been proposed to enhance the beam displacements. [14,15] Some studies illustrate that the 1D photonic crystal (1DPC) is similar to 2D and 3D ones and also show characteristics of the PBG.…”

Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Goos−Hänchen Displacement in Quasiperiodic Gradient 1D Photonic Crystal

Wang

Cai

et al. 2022

Physica Status Solidi (b)

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In recent years, various approaches for GH (Goos−Hänchen) displacement control have been proposed, including various waveguide structures, different material interfaces, and other physical phenomena (such as surface plasmon resonance, etc.), which make GH displacement flexible and controllable. Herein, the magneto‐optic GH displacement in quasiperiodic gradient 1D photonic crystals is introduced. The variation of GH displacement by changing the magnetic field for periodic and quasiperiodic structures is shown. The thickness of the initial material is determined by the change of the material thickness, and then the tunable GH displacement is observed under the applied magnetic field. The GH value increases with the thicker gradient thickness but decreases with increase in magnetic field, and it is more sensitive to the magnetic field intensity.

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“…Although it was recently developed by Hosten and Kwait [5] that the weak measurements method [6][7][8] is successfully employed to characterize the PSHE shifts, enhancing and controlling PSHE shifts is still an important issue. Many various architectures have been proposed to enhance PSHE shifts, such as different material interfaces [9][10][11][12], optical systems [13][14][15], metasurfaces [16][17][18], photonic crystals [19][20][21][22], metamaterials [23][24][25][26][27][28][29][30][31][32][33], and other systems [34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Controlling photonic spin Hall effect by a symmetric hyperbolic metamaterial waveguide

Gao

Zhang

Guo

2021

Preprint

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We investigate the photonic spin Hall effect (PSHE) in a symmetrical hyperbolic metamaterial (HMM) waveguide, which is constructed as an HMM/metal/HMM sandwich structure. We consider both type {\uppercase\expandafter{\romannumeral 1}} and type {\uppercase\expandafter{\romannumeral 2}} HMM in the study. We confirm that the structure of alternating sub-wavelength of plasma and dielectric or the structure of embedding plasma into a host dielectric matrix can display effective dielectric, effective metal, type {\uppercase\expandafter{\romannumeral 1}} and {\uppercase\expandafter{\romannumeral 2}} HMM under different wavelength ranges and different plasma fill fraction. This enable us to simultaneously realize type {\uppercase\expandafter{\romannumeral 1}} and type {\uppercase\expandafter{\romannumeral 2}} HMM. We show that the reflectivity ration $\vert r_{s}/r_{p} \vert$, directly related to transverse shifts generated by PSHE, greatly depends on the type and the thickness of HMM. Moreover, we find that the horizontal PSHE shifts are enhanced several times, especially in type {\uppercase\expandafter{\romannumeral 1}} structure; while the vertical PSHE shifts are significantly suppressed in both type {\uppercase\expandafter{\romannumeral 1}} and {\uppercase\expandafter{\romannumeral 2}} structure. By making the effect of metal type and thickness analysis, we further show that the impacts of these two factors on PSHE shifts are mainly subject to HMM thickness.

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Enhancement and modulation of photonic spin Hall effect by defect modes in photonic crystals with graphene

Cited by 55 publications

References 49 publications

Broadband Terahertz Polarizing Beam Splitter Based on a Graphene-Based Defective One-Dimensional Photonic Crystal

Broadband Terahertz Polarizing Beam Splitter Based on a Graphene-Based Defective One-Dimensional Photonic Crystal

Magneto‐Optical Goos−Hänchen Displacement in Quasiperiodic Gradient 1D Photonic Crystal

Controlling photonic spin Hall effect by a symmetric hyperbolic metamaterial waveguide

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