Quantitative analysis and near-field observation of strong coupling between plasmonic nanogap and silicon waveguides

Salas‐Montiel, Rafael; Apuzzo, Aniello; Delacour, Cécile; Sedaghat, Zohreh; Bruyant, Aurélien; Grosse, Philippe; Chelnokov, A.; Lerondel, Gilles; Blaize, Sylvain

doi:10.1063/1.4725511

Cited by 26 publications

(14 citation statements)

References 26 publications

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“…Nowadays there are increasing demands to merge electronic and photonic devices on a chip scale as a breakthrough to overcome the limit of electronic-only devices [2]. Since nanoplasmonic waveguide devices are expected to play a key role in satisfying such demands, diverse nanoplasmonic waveguides with different structures have been proposed, theoretically investigated, and realized in some cases [3][4][5][6][7][8][9][10][11][12]. A few examples are channel plasmon polariton waveguides [3,4], dielectric-loaded surface plasmon polariton waveguides [5,6], metal-insulator-metal waveguides [7,8], and hybrid plasmonic waveguides [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterizations of realized metal-insulator-silicon-insulator-metal waveguides and nanochannel fabrication via insulator removal

Kwon

Shin

et al. 2012

Opt. Express

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We investigate experimentally metal-insulator-silicon-insulator-metal (MISIM) waveguides that are fabricated by using fully standard CMOS technology. They are hybrid plasmonic waveguides, and they have a feature that their insulator is replaceable with functional material. We explain a fabrication process for them and discuss fabrication results based on 8-inch silicon-on-insulator wafers. We measured the propagation characteristics of the MISIM waveguides that were actually fabricated to be connected to Si photonic waveguides through symmetric and asymmetric couplers. When incident light from an optical source has transverse electric (TE) polarization and its wavelength is 1318 or 1554 nm, their propagation losses are between 0.2 and 0.3 dB/μm. Excess losses due to the symmetric couplers are around 0.5 dB, which are smaller than those due to the asymmetric couplers. Additional measurement results indicate that the MISIM waveguide supports a TE-polarized hybrid plasmonic mode. Finally, we explain a process of removing the insulator without affecting the remaining MISIM structure to fabricate ~30-nm-wide nanochannels which may be filled with functional material.

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Section: Introductionmentioning

confidence: 99%

Characterizations of realized metal-insulator-silicon-insulator-metal waveguides and nanochannel fabrication via insulator removal

Kwon

Shin

et al. 2012

Opt. Express

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“…Recently, strong coupling has been demonstrated between a surface plasmon propagating on a planar silver thin film and the lowest excited state of CdSe nanocrystals 26 . This regime has also been claimed for a coupled-waveguide system formed by SOI waveguides and a plasmonic nanogap supporting a propagative surface plasmon polariton 27 , 28 .…”

Section: Introductionmentioning

confidence: 53%

Strong coupling and vortexes assisted slow light in plasmonic chain-SOI waveguide systems

Magno

Février

Gogol

et al. 2017

Sci Rep

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A strong coupling regime is demonstrated at near infrared between metallic nanoparticle chains (MNP), supporting localized surface plasmons (LSP), and dielectric waveguides (DWGs) having different core materials. MNP chains are deposited on the top of these waveguides in such a way that the two guiding structures are in direct contact with each other. The strong coupling regime implies (i) a strong interpenetration of the bare modes forming two distinct supermodes and (ii) a large power overlap up to the impossibility to distinguish the power quota inside each bare structure. Additionally, since the system involves LSPs, (i) such a strong coupling occurs on a broad band and (ii) the peculiar vortex-like propagation mechanism of the optical power, supported by the MNP chain, leads to a regime where the light is slowed down over a wide wavelength range. Finally, the strong coupling allows the formation of guided supermodes in regions where the bare modes cannot be both guided at the same time. In other words, very high k modes can then be propagated in a dielectric photonic circuit thanks to hybridisation, leading to extremely concentrated propagating wave. Experimental work gives indirect proof of strong coupling regime whatever the waveguide core indexes.

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“…They are expected to enable the integration density of a photonic integrated-circuit to be increased, and they could play an important role in bridging a photonic integrated-circuit and an electronic integrated-circuit. A variety of nanoplasmonic waveguides have been proposed and theoretically studied, and a small number of them have been realized and experimentally studied [1]- [8]. This may be due to two kinds of difficulty: difficulty in fabricating nanoplasmonic structures and difficulty in coupling light into and out of nanoplasmonic waveguides.…”

Section: Introductionmentioning

confidence: 99%

Metal–Insulator–Silicon–Insulator–Metal Waveguide Splitters With Large-Arm Separation

Kwon

Shin

Lee

2015

J. Lightwave Technol.

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Symmetric 12 splitters of metal-insulator-siliconinsulator-metal (MISIM) waveguides, which are hybrid plasmonic waveguides with a 190-nm-wide silicon strip covered by 30-nm-thick SiO 2 and sandwiched by copper, are theoretically and experimentally investigated. The splitters consist of a Y-branch, two 90 submicrometer-radius bends (SRBs), and two straight MISIM waveguides connecting the Y-branch and the two SRBs. The Y-branch is an overlap of two oppositely-directed SRBs. All the SRBs of the splitter have the same radius of curvature. The splitter has a feature that the length of the in-between MISIM waveguides is adjusted to make its input waveguide split over a short distance into its widely-separated output waveguides. Simulation of the splitters indicates that the radius of curvature of the SRB needs to be  0.8 m to make small the excess losses of the splitters. When the radius of curvature is 0.8 m, the splitter which can connect its input waveguide just over 1.6 m to its output waveguides spaced 6.4 m apart has an excess loss of 1.4 dB. The splitters are realized by using standard CMOS technology. The measured excess losses of the fabricated splitters are larger than the calculated excess losses. However, the measured dependence of the excess loss on the radius of curvature is similar to the calculated one. Finally, the splitter feature is theoretically confirmed, and addition of a tapering region to the Y-branch is discussed to reduce the excess loss of the Y-branch.

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Quantitative analysis and near-field observation of strong coupling between plasmonic nanogap and silicon waveguides

Cited by 26 publications

References 26 publications

Characterizations of realized metal-insulator-silicon-insulator-metal waveguides and nanochannel fabrication via insulator removal

Characterizations of realized metal-insulator-silicon-insulator-metal waveguides and nanochannel fabrication via insulator removal

Strong coupling and vortexes assisted slow light in plasmonic chain-SOI waveguide systems

Metal–Insulator–Silicon–Insulator–Metal Waveguide Splitters With Large-Arm Separation

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