Improved Models for Plasmonic Waveguide Splitters and Demultiplexers at the Telecommunication Wavelengths

Zhu, Jia; Huang, Xu; Mei, Xian

doi:10.1109/tnano.2011.2123113

Cited by 18 publications

(3 citation statements)

References 33 publications

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“…Various devices have been proposed to achieve the division of guided surface plasmon polaritons, e.g. by using symmetrical gratings on either sides of nanostructures [17,18], Y-shaped power dividers [19,20], T-shaped power dividers [21][22][23], and dividers related to the multimode interference [24][25][26][27]. But there are two discrepancies in the above-mentioned power dividers which need to be address comprehensively: the first one is, how to make sure the transmission efficiency of produced SPP waves in the coveted branch, and the second is, how to design the mechanism for splitting the power as per required proportion.…”

Section: Introductionmentioning

confidence: 99%

A compact broadband power divider based on spoof surface plasmon polaritons

Aziz¹

2019

Laser Phys.

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In this letter, a compact broadband spoof surface plasmon polaritons (SPPs) power divider based on the coupled mode theory with excellent transmission efficiency is proposed. An equal power divider is constructed in order to divide the energy of spoof SPPs equally between the two output ports into two equal parts with good isolation. This coupling method consists of four coupling units which are designed near the input port for splitting the energy towards the two output ports. The energy is transferred not only through spoof SPPs but also through the coupling units. The coplanar waveguides with 50 Ω impedance have been designed for feeding or extracting signals at three ends of the spoof SPP waveguide. According to the coupled mode theory, the fields of SPPs along a single waveguide in a specific frequency range can be readily coupled into two adjacent branch waveguides with the same propagation constants. This technique has been adopted for impedance matching in a 3-port lossy network. The simulations showed that the two output ports can be efficiently driven by the input port. The S-parameters and near-field results are also provided to verify the performance of the proposed power divider. The proposed spoof SPPs based power divider will find many innovative applications and will be an important addition towards the development of advanced plasmonic circuits at the microwave and terahertz frequencies.

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Section: Introductionmentioning

confidence: 99%

A compact broadband power divider based on spoof surface plasmon polaritons

Aziz¹

2019

Laser Phys.

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“…To realize photonic circuitry based on plasmonics, a variety of components such as splitters [5][6][7], couplers [8,9], multi-demultiplexers [10][11][12][13], switches [14], logic gates [15], etc. have recently been studied.…”

Section: Introductionmentioning

confidence: 99%

Improved Plasmonic Filter, Ultra-Compact Demultiplexer, and Splitter

Rahimzadegan¹,

Granpayeh²,

Hosseini³

2014

Journal of the Optical Society of Korea

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In this paper, metal insulator metal (MIM) plasmonic slot cavity narrow band-pass filters (NBPFs) are studied. The metal and dielectric of the structures are silver (Ag) and air, respectively. To improve the quality factor and attenuation range, two novel NBPFs based on tapered structures and double cavity systems are proposed and numerically analyzed by using the two-dimensional (2-D) finite difference time domain (FDTD) method. The impact of different parameters on the transmission spectrum is scrutinized. We have shown that increasing the cavities' lengths increases the resonance wavelength in a linear relationship, and also increases the quality factor, and simultaneously the attenuation of the wave transmitted through the cavities. Furthermore, increasing the slope of tapers of the input and output waveguides decreases attenuation of the wave transmitted through the waveguide, but simultaneously decreases the quality factor, hence there should be a trade-off between loss and quality factor. However, the idea of adding tapers to the waveguides' discontinuities of the simple structure helps us to improve the device total performance, such as quality factor for the single cavity and attenuation range for the double cavity. According to the proposed NBPFs, two, three, and four-port power splitters functioning at 1320 nm and novel ultra-compact two-wavelength and triple-wavelength demultiplexers in the range of 1300-1550 nm are proposed and the impacts of different parameters on their performances are numerically investigated. The idea of using tapered waveguides at the structure discontinuities facilitates the design of ultra-compact demultiplexers and splitters.

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“…Power splitter is an essential component for integrated circuit and system, which is also an important part of antenna array. Several concepts achieving the split of guided plasmons have been studied, e.g., based on symmetrical gratings on both sides of nanostructures 17 18 , Y-shaped splitters 19 20 , T-shaped splitters 21 22 23 , and splitters related to the multimode interference 24 25 26 27 . However, two problems need to be solved in the above-mentioned power splitters: how to guarantee the transmission of generated SPPs in the desired branch, and how to split the power according to a desired proportion.…”

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confidence: 99%

Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons

Yin

Zhang

et al. 2016

Sci Rep

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We propose a splitter feeding network for array radiations of spoof surface plasmon polaritons (SPPs), which are guided by ultrathin corrugated metallic strips. Based on the coupled mode theory, SPP fields along a single waveguide in a certain frequency range can be readily coupled into two adjacent branch waveguides with the same propagation constants. We propose to load U-shaped particles anti-symmetrically at the ends of such two branch waveguides, showing a high integration degree of the feeding network. By controlling linear phase modulations produced by the U-shaped particle chain, we demonstrate theoretically and experimentally that the SPP fields based on bound modes can be efficiently radiated to far fields in broadside direction. The proposed method shows that the symmetry of electromagnetic field modes can be exploited to the SPP transmission network, providing potential solutions to compact power dividers and combiners for microwave and optical devices and systems.

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Improved Models for Plasmonic Waveguide Splitters and Demultiplexers at the Telecommunication Wavelengths

Cited by 18 publications

References 33 publications

A compact broadband power divider based on spoof surface plasmon polaritons

A compact broadband power divider based on spoof surface plasmon polaritons

Improved Plasmonic Filter, Ultra-Compact Demultiplexer, and Splitter

Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons

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