Propagation characteristics of hybrid modes supported by metal-low-high index waveguides and bends

Alam, Md. Zahangir; Meier, Joachim; Aitchison, J. S.; Mojahedi, Mo

doi:10.1364/oe.18.012971

Cited by 152 publications

(89 citation statements)

References 19 publications

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“…A good understanding of the HPWG mode characteristic is essential for design of the proposed coupler. Such an analysis has been reported in [11]. Figures 2 (a) and 2(b) show the mode profiles of the symmetric ( + ) and anti-symmetric (-) TM modes of the coupled silicon waveguides at 1.55 µm.…”

Section: Using a Phase Delay Section To Create A Broadband Directionamentioning

confidence: 54%

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Compact low loss and broadband hybrid plasmonic directional coupler

Alam¹,

Caspers²,

Aitchison³

et al. 2013

Opt. Express

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Abstract:We propose a novel broadband coupler for silicon photonics using a hybrid plasmonic waveguide section. The hybrid plasmonic waveguide is used to create an asymmetric section in the middle of a silicon nanowire waveguide coupler to introduce a phase delay to allow for a 3-dB power coupling ratio over a 150 nm bandwidth around 1.55 µm. The device is very compact (<8.5 µm) and has a low insertion loss (<0.15 dB).

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Section: Using a Phase Delay Section To Create A Broadband Directionamentioning

confidence: 54%

“…Recently we have proposed a hybrid plasmonic waveguide (HPWG) that consists of a metal plane separated from a high index material by a low index spacer [10,11]. The proposed guide offers a number of advantages: it is very compact and provides a better compromise between loss and confinement compared to purely plasmonic guides.…”

Section: Introductionmentioning

confidence: 99%

Compact low loss and broadband hybrid plasmonic directional coupler

Alam¹,

Caspers²,

Aitchison³

et al. 2013

Opt. Express

Self Cite

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show abstract

“…Their phase matching and evolutions are more complex. This in turn requires a methodical investigation of pure plasmonic modal properties to design the compact long-range plasmonic and hybrid plasmonic waveguides [4], [5] of the future to exploit the unique features of SPPs in the applications of nano-dimensional passive waveguides, devices [6], [7], and for bio-chemical [8] and gas sensing [9].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Plasmonic Modes in a Metal Nano-Wire Studied by a Modified Finite Element Method

Ghosh

Rahman

2018

J. Lightwave Technol.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/JLT.2017.2782710, Journal of Lightwave Technology  Abstract-A finite width thin metal film plasmonic nanowire with its unique feature of sub-wavelength light guiding is finding many applications in compact integrated nanophotonic circuits and sensors. Full-vectorial finite element method (FV-FEM) is becoming an important simulation tool for the analyses of such exotic waveguides. Instead of a penalty approach reported earlier, a more direct divergence formulation considering each discretized element's optical properties to eliminate non-physical modal eigenvectors has been exploited and is reported here. Long and short-range fundamental and higher order plasmonic modes and supermodes of a pure metal nanowire and their evolutions with waveguide geometry, surrounding identical and non-identical dielectric cladding materials and operating wavelength are thoroughly studied. Interesting long-range modal properties such as, supermode formation, complex phase matching and mode evolution in identical and non-identical clad metal nanowires have been observed and explained in detail including supermode profiles. This study is expected to help in understanding the evolution of plasmonic guided modes in compact active and passive integrated photonic devices containing metal narrow strips. Permanent repository link

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“…In the absence of the dielectric gap and metallic substrate, the fundamental guided mode of the nanowire is the circularly symmetric transverse-magnetic (TM 01 ) mode without the frequency cutoff. When this mode couples to the plasmonic mode of the planar structure composed of the dielectric gap and metallic substrate [21], the resulted hybrid mode is transversely confined in an ultrasmall area inside the dielectric gap. It is expected that the wire radius r influences the dispersion relation of metallic waveguide modes, and the gap height h affects the coupling strength between the modes of nanowire and planar structure [19].…”

Section: Introductionmentioning

confidence: 99%

Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

Cheng

Weng

Chang

et al. 2013

IEEE J. Select. Topics Quantum Electron.

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Abstract-In this paper, we investigate the effect of cladding layers on a hybrid plasmonic nanowire cavity. A decent confinement factor and moderate modal loss can be achieved for lasing. Within a certain index range of the cladding layer, the fundamental hybrid plasmonic mode is well confined inside the narrow gain region and becomes the most promising lasing mode. Our results also indicate that the mirror loss can be reduced if the refractive index of the cladding layer is properly chosen. An estimated cold-cavity quality factor of 87, corresponding to a threshold gain of about 1072 cm −1 , is achievable at a cavity length of 10.13 μm for the lasing mode.

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Propagation characteristics of hybrid modes supported by metal-low-high index waveguides and bends

Cited by 152 publications

References 19 publications

Compact low loss and broadband hybrid plasmonic directional coupler

Compact low loss and broadband hybrid plasmonic directional coupler

Evolution of Plasmonic Modes in a Metal Nano-Wire Studied by a Modified Finite Element Method

Cladding Effect on Hybrid Plasmonic Nanowire Cavity at Telecommunication Wavelengths

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