Highly efficient coupler for dielectric slot waveguides and hybrid plasmonic waveguides

Yu, Jiyao; Ohtera, Yasuo; Yamada, Hirohito

doi:10.7567/jjap.57.052202

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…The surface plasmon polaritons (SPPs) along the interface between a metal and dielectric play an important role in optical devices. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] To excite SPPs traveling at a dielectric/ metal flat interface, grating structures have been extensively investigated and the excitation of SPPs has been demonstrated. Gratings are efficient to perform the fiber-to-fiber optical interfacing of optical waveguides.…”

Section: Introductionmentioning

confidence: 99%

Selectivity of dominant surface plasmon polariton modes using thin metal waveguides with grating structures

Hamashima¹,

Wu²,

Kishimoto³

et al. 2022

Jpn. J. Appl. Phys.

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In this study, the conversion of incident light to surface plasmon polaritons (SPPs) was verified for a dielectric-metal-dielectric waveguide with a grating structure. The dominant SPP mode with respect to the propagation distance could be selected by adjusting the thickness of the gold film. The parameters of the grating structure were optimized, and highly efficient light-to-SPP conversion could be realized.

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Section: Introductionmentioning

confidence: 99%

Selectivity of dominant surface plasmon polariton modes using thin metal waveguides with grating structures

Hamashima¹,

Wu²,

Kishimoto³

et al. 2022

Jpn. J. Appl. Phys.

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Compact and wideband multiport plasmonic coupler–splitter based on coding metamaterials

Yu¹,

Liu²,

Dai³

et al. 2023

J. Opt. Soc. Am. B

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We propose plasmonic coupler–splitters based on embedded coding metamaterials. The fundamental transverse electric mode in a silicon waveguide is coupled to the surface plasmon polariton mode in plasmonic waveguides with high efficiency of nearly 95% and wide bandwidth of 1.45–1.65 µm, and then light is split into different output ports. To improve the performance of the devices, a multi-objective optimization scheme based on the non-dominated sorting genetic algorithm-II assisted by the direct-binary search method is applied in the design of coding metamaterials. The simulated results exhibit that utilizing our inverse design scheme, the plasmonic coupler–splitter can perform effective plasmonic coupling (total coupling efficiencies of more than 92%) and high-quality power splitting with various split ratios (split ratio errors lower than 1%) and output directions at a broad bandwidth (1.45–1.65 µm) simultaneously. The function of the frequency split can also be implemented in the same universal basic scheme. In comparison to previous works, we not only propose flexible coupler–splitter designs for various functions based on a universal design scheme, but also introduce effective algorithms for the inverse design of optical devices based on coding metamaterials.

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Silicon-Based Optoelectronics Enhanced by Hybrid Plasmon Polaritons: Bridging Dielectric Photonics and Nanoplasmonics

Sun

Zhu

et al. 2021

Photonics

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Silicon-based optoelectronics large-scale integrated circuits have been of interest to the world in recent decades due to the need for higher complexity, larger link capacity, and lower cost. Surface plasmons are electromagnetic waves that propagate along the interface between a conductor and a dielectric, which can be confined several orders smaller than the wavelength in a vacuum and offers the potential for minimizing photonic circuits to the nanoscale. However, plasmonic waveguides are usually accompanied by substantial propagation loss because metals always exhibit significant resistive heating losses when interacting with light. Therefore, it is better to couple silicon-based optoelectronics and plasmonics and bridge the gap between micro-photonics and nanodevices, especially some nano-electronic devices. In this review, we discuss methods to enhance silicon-based optoelectronics by hybrid plasmon polaritons and summarize some recently reported designs. It is believed that by utilizing the strong light confinement of plasmonics, we can overcome the conventional diffraction limit of light and further improve the integration of optoelectronic circuits.

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Highly efficient coupler for dielectric slot waveguides and hybrid plasmonic waveguides

Cited by 3 publications

References 26 publications

Selectivity of dominant surface plasmon polariton modes using thin metal waveguides with grating structures

Selectivity of dominant surface plasmon polariton modes using thin metal waveguides with grating structures

Compact and wideband multiport plasmonic coupler–splitter based on coding metamaterials

Silicon-Based Optoelectronics Enhanced by Hybrid Plasmon Polaritons: Bridging Dielectric Photonics and Nanoplasmonics

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