Identification and control of multiple leaky plasmon modes in silver nanowires

Yang, Hangbo; Qiu, Min; Li, Qiang

doi:10.1002/lpor.201500192

Cited by 41 publications

(74 citation statements)

References 60 publications

(97 reference statements)

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“…β/K 0 is the effective refractive index of the plasmonic mode, and the imaginary part (β') represents the propagation loss. Details of image formation on the FFP and BFP, and how to derive the embedded optical information from the BFP and FFP images, can be found in references [29][30][31][32][33]. The silver nanowire (Ag NW) was placed on a dielectric multilayer consisting of alternating layers of SiO2 (105-nm-thick) and Si3N4 (88-nm-thick).…”

Section: Methodsmentioning

confidence: 99%

Manipulating Propagation Constants of Silver Nanowire Plasmonic Waveguide Modes Using a Dielectric Multilayer Substrate

et al. 2018

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Abstract:Experiments and numerical simulations demonstrate that when a silver nanowire is placed on a dielectric multilayer, but not the commonly used bare glass slide, the effective refractive index of the propagating surface plasmons along the silver nanowire can be controlled. Furthermore, by increasing the thickness of the top dielectric layer, longer wavelength light can also propagate along a very thin silver nanowire. In the experiment, the diameter of the silver nanowire could be as thin as 70 nm, with the incident wavelength as long as 640 nm. The principle of this control is analysed from the existence of a photonic band gap and the Bloch surface wave with this dielectric multilayer substrate.

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Section: Methodsmentioning

confidence: 99%

Manipulating Propagation Constants of Silver Nanowire Plasmonic Waveguide Modes Using a Dielectric Multilayer Substrate

et al. 2018

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“…[58]. [58] Mixture of these physical characteristic had numerous advantages over isolated organic or plasmonic nanostructures and could potentially facilitate test-beds for strong and weak-coupling physics, low propagation loss waveguides, [59] high speed data transmittance, [2] mode conversion, [60] and efficiency enhancement in energy harvesting devices. The maximum intensity was found at k x /k 0 = 1.08, which indicated effective refractive index value of leaky mode.…”

Section: Effective Refractive Index Of Leaky Modementioning

confidence: 99%

Radiative Channeling of Nanowire Frenkel Exciton Polaritons through Surface Plasmons

Tripathi

Vasista

Chikkaraddy

et al. 2017

Advanced Optical Materials

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CommuniCation(1 of 6) 1600873 wave guiding [26] of light over millimeter length scale. Such long distance optical transport properties have been utilized for variety of nanophotonics applications such as optical logic gates, [27] resonators, [9,28] nanolasers, [26] photonic circuits, [12,28] etc.Interfacing organic molecular platforms with surface plasmons (SPs), [29][30][31] which are charge density oscillations at metal-dielectric interface, can provide excellent platform to study exciton-plasmon interaction at weak [32] and strong coupling [33,34] regimes. Interestingly, such coupling can also be harnessed for controlling light emission from organic nanostructures, [35] down to single photon limit. [36] A variety of schemes have been explored to interface excitonic systems with surface plasmons such as coupling of quantum dots with plasmonic substrate, [37] layered materials with plasmonic lattice, [38] core-shell nanoparticles, [33] molecular J-aggregates layer with plasmonic nanoparticles, [39,40] and photonic nanowire with gold nanoparticles. [36] These investigations are predominantly confined to probe energy transfer mechanism, recombination processes, [41] photoluminescence enhancement, [42] Rabi splitting, [43] generation of hybrid states, [44] biosensing applications, [45,46] and low-threshold nonlinear effects. [21] In many of these approaches, the dimensionality of the molecular material is either quasi 0D or quasi 2D in nature. So far, there are a few reports [47,48] on interfacing quasi 1D organic molecular systems, such as horizontally oriented nanowires with surface plasmons. [47,48] Alternately, we have recently introduced vertically oriented organic nanowire on a gold thin film. [49] Such a single, vertical nanowire provides a unique opportunity to study coupling of 1D propagating exciton polaritons with 2D propagating plasmon polaritons at nanoscale at a single point of contact. In this coupling scheme, an important issue to be addressed is the outcoupling of EP photoluminescence emission from a single, vertical nanowire into a specific direction through leaky plasmon channels of a gold film. Given that spontaneous emission is isotropic, there is an imperative to channel the nanowire emission, such that a majority of the light is collected and harnessed. Such directional outcoupling of emitted light has consequence on designing photovoltaic devices such as single-nanowire solar cells, [41,50,51] organic light emitting devices, [3,23] exciton-polariton lasers, [26] and nanooptical biosensors. [21,23] Here, we experimentally demonstrate directional, excitonpolariton photoluminescence emission channeled from a single, vertical organic nanowire through a plasmonic leaky channel of gold thin film. Figure 1 shows the conceptual schematic of the experiment. The tip of a vertically oriented organic semiconducting nanowire made of di-amino-anthraquinone (DAAQ) molecules is excited by a tightly focused laser beam at 532 nm wavelength. This excitation wavelength is close Hybrid nanophotonic devices compr...

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“…Recently, it is found that SPPs have the ability of achieving optical switching effects and minimizing all-optical components [3][4][5][6][7]. Researchers have put many efforts into plasmonic analogs of optical switching in metal-dielectric nanocomposites and metalinsulator-metal (MIM) waveguides, indicating nonlinear and fast optical responses near the frequency of surface plasmon resonance [8][9][10].…”

Section: Introductionmentioning

confidence: 99%