Analysis and Optimum Design of Hybrid Plasmonic Slab Waveguides

Noghani, Mahmoud Talafi; Samiei, Mohammad Hashem Vadjed

doi:10.1007/s11468-013-9526-x

Cited by 42 publications

(7 citation statements)

References 29 publications

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“…SPP waveguides based on metal nanostructures were regarded as one of the most effective platform for subwavelength waveguiding and great progress has been achieved in the past decades. Particularly, the recently developed hybrid plasmonic waveguides have been considered as one of the most attractive options because of the possibility to achieve low-loss subwavelength waveguiding [42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78]. Among various hybrid plasmonic waveguides, an SOI-compatible hybrid nanoplasmonic waveguide, proposed for the first time by Dai et al [12], is one of the most attractive designs as silicon photonics is CMOS (complementary metal oxide semiconductor) compatible and has become very popular for realizing PICs.…”

Section: Subwavelength Waveguides and Devices Based On Plasmonic Nmentioning

confidence: 99%

Utilization of Field Enhancement in Plasmonic Waveguides for Subwavelength Light-Guiding, Polarization Handling, Heating, and Optical Sensing

Dai

Zhang

2015

Materials

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Plasmonic nanostructures have attracted intensive attention for many applications in recent years because of the field enhancement at the metal/dielectric interface. First, this strong field enhancement makes it possible to break the diffraction limit and enable subwavelength optical waveguiding, which is desired for nanophotonic integrated circuits with ultra-high integration density. Second, the field enhancement in plasmonic nanostructures occurs only for the polarization mode whose electric field is perpendicular to the metal/dielectric interface, and thus the strong birefringence is beneficial for realizing ultra-small polarization-sensitive/selective devices, including polarization beam splitters, and polarizers. Third, plasmonic nanostructures provide an excellent platform of merging electronics and photonics for some applications, e.g., thermal tuning, photo-thermal detection, etc. Finally, the field enhancement at the metal/dielectric interface helps a lot to realize optical sensors with high sensitivity when introducing plasmonic nanostrutures. In this paper, we give a review for recent progresses on the utilization of field enhancement in plasmonic nanostructures for these applications, e.g., waveguiding, polarization handling, heating, as well as optical sensing.

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Section: Subwavelength Waveguides and Devices Based On Plasmonic Nmentioning

confidence: 99%

Utilization of Field Enhancement in Plasmonic Waveguides for Subwavelength Light-Guiding, Polarization Handling, Heating, and Optical Sensing

Dai

Zhang

2015

Materials

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“…By combining high-index dielectric nanowires with the metallic structures to couple with the plasmonic mode, the high-refractive index contrast could facilitate strong hybridization between dielectric modes and SPP modes, leading to nanoscale mode area with reasonable propagation length. [19][20][21] Based on this metal/dielectric hybridized structure, tremendous work has been placed on exploring high-quality HPW waveguiding schemes, including low-loss long-range SPP, 22 subwavelength localized SPP in metal wedges, 23 and ridges, 24,25 as well as hybrid metal-dielectric slot waveguides. 26,27 Their unique capability could provide improved optical performance in achieving reasonable propagation length of tens of microns while maintaining subwavelength mode confinement ability, thus, enabling a number of high-performance and fascinating optical applications.…”

Section: Introductionmentioning

confidence: 99%

“… – 18 In particular, HPW, which integrates plasmonic waveguides with dielectric components, has demonstrated an effective solution to alleviate the Ohmic loss in the traditional metallic structures by coupling SPPs and dielectric modes. By combining high-index dielectric nanowires with the metallic structures to couple with the plasmonic mode, the high-refractive index contrast could facilitate strong hybridization between dielectric modes and SPP modes, leading to nanoscale mode area with reasonable propagation length 19 – 21 Based on this metal/dielectric hybridized structure, tremendous work has been placed on exploring high-quality HPW waveguiding schemes, including low-loss long-range SPP, 22 subwavelength localized SPP in metal wedges, 23 and ridges, 24 , 25 as well as hybrid metal-dielectric slot waveguides 26 , 27 .…”

Section: Introductionmentioning

confidence: 99%

Mode confinement enhanced in hybrid Bloch surface wave long-range waveguide

et al. 2023

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.In aims to enhance the electric-field confinement capability of Bloch surface wave (BSW) with low propagation loss, here, we develop a high-performance hybrid BSW waveguide that incorporates a high-index nano-ridge loaded photonic crystal slab with a silicon dielectric nanowire. Leveraging the mode hybridization, a subwavelength mode confinement in conjunction with long-range waveguiding is achievable. Its robust properties against the possible fabrication imperfection for practical implementations and comparisons with similar hybrid waveguide configurations are also discussed to indicate the improved guiding performance of our proposed waveguide. These remarkable optical properties render such waveguide to hold the promise of building numerous high-performance nanophotonic devices.

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“…The unique electronic structure which is formed at the metal–semiconductor interface for such systems was demonstrated for improving the photocatalytic performance, for example, for the degradation of various dyes , and for the photoconversion of formic acid into hydrogen and carbon dioxide . In the optics field such structures were applied for realizing high quality factor waveguides, negative index materials, IR modulator, photoacoustic, and plasmonics based devices. The HNS prepared here exhibit desirable combination of aspect ratios and dimensions with the metallic tip dimensions in the range of tens to hundreds nanometers and the SC component with typically several tens of nanometer in diameter and up to tens of microns in length.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor–Metal Nanofloret Hybrid Structures by Self-Processing Synthesis

et al. 2016

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We present a synthetic strategy that takes advantage of the inherent asymmetry exhibited by semiconductor nanowires prepared by Au-catalyzed chemical vapor deposition (CVD). The metal-semiconductor junction is used for activating etch, deposition, and modification steps localized to the tip area using a wet-chemistry approach. The hybrid nanostructures obtained for the coinage metals Cu, Ag, and Au resemble the morphology of grass flowers, termed here Nanofloret hybrid nanostructures consisting of a high aspect ratio SiGe nanowire (NW) with a metallic nanoshell cap. The synthetic method is used to prepare hybrid nanostructures in one step by triggering a programmable cascade of events that is autonomously executed, termed self-processing synthesis. The synthesis progression was monitored by ex situ transmission electron microscopy (TEM), in situ scanning transmission electron microscopy (STEM) and inductively coupled plasma mass spectrometry (ICP-MS) analyses to study the mechanistic reaction details of the various processes taking place during the synthesis. Our results indicate that the synthesis involves distinct processing steps including localized oxide etch, metal deposition, and process termination. Control over the deposition and etching processes is demonstrated by several parameters: (i) etchant concentration (water), (ii) SiGe alloy composition, (iii) reducing agent, (iv) metal redox potential, and (v) addition of surfactants for controlling the deposited metal grain size. The NF structures exhibit broad plasmonic absorption that is utilized for demonstrating surface-enhanced Raman scattering (SERS) of thiophenol monolayer. The new type of nanostructures feature a metallic nanoshell directly coupled to the crystalline semiconductor NW showing broad plasmonic absorption.

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Analysis and Optimum Design of Hybrid Plasmonic Slab Waveguides

Cited by 42 publications

References 29 publications

Utilization of Field Enhancement in Plasmonic Waveguides for Subwavelength Light-Guiding, Polarization Handling, Heating, and Optical Sensing

Utilization of Field Enhancement in Plasmonic Waveguides for Subwavelength Light-Guiding, Polarization Handling, Heating, and Optical Sensing

Mode confinement enhanced in hybrid Bloch surface wave long-range waveguide

Semiconductor–Metal Nanofloret Hybrid Structures by Self-Processing Synthesis

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