Controlling Fano lineshapes in plasmon-mediated light coupling into a substrate

Spinelli, Pierpaolo; Lare, Claire van; Verhagen, Ewold; Polman, A.

doi:10.1364/oe.19.00a303

Cited by 67 publications

(60 citation statements)

References 18 publications

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“…This is a clear sign of strong scattering by the LSPR of the NW network around λ ~ 450 nm. Fano-interference with the non-scattered light causes destructive interference for λ < λ LSPR , and constructive interference for λ > λ LSPR 34. For larger NW pitches, the wire density decreases, such that the scattering amplitude of the LSPR also decreases.…”

Section: Resultsmentioning

confidence: 99%

Large-area soft-imprinted nanowire networks as light trapping transparent conductors

Groep

Gupta

Verschuuren

et al. 2015

Sci Rep

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Using soft-imprint nanolithography, we demonstrate large-area application of engineered two-dimensional polarization-independent networks of silver nanowires as transparent conducting electrodes. These networks have high optical transmittance, low electrical sheet resistance, and at the same time function as a photonic light-trapping structure enhancing optical absorption in the absorber layer of thin-film solar cells. We study the influence of nanowire width and pitch on the network transmittance and sheet resistance, and demonstrate improved performance compared to ITO. Next, we use P3HT-PCBM organic solar cells as a model system to show the realization of nanowire network based functional devices. Using angle-resolved external quantum efficiency measurements, we demonstrate engineered light trapping by coupling to guided modes in the thin absorber layer of the solar cell. Concurrent to the direct observation of controlled light trapping we observe a reduction in photocurrent as a result of increased reflection and parasitic absorption losses; such losses can be minimized by re-optimization of the NW network geometry. Together, these results demonstrate how engineered 2D NW networks can serve as multifunctional structures that unify the functions of a transparent conductor and a light trapping structure. These results are generic and can be applied to any type of optoelectronic device.

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Section: Resultsmentioning

confidence: 99%

Large-area soft-imprinted nanowire networks as light trapping transparent conductors

Groep

Gupta

Verschuuren

et al. 2015

Sci Rep

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“…Recently, Spinelli et al, by means of FDTD calculations, systematically studied the effect of Ag nanoparticle shape and substrate on LSPmediated light coupling to a high-index substrate [126]. The dipolar resonance is strongly redshifted when the shape is changed from a sphere to a cylinder because of the increased near-field coupling of the dipolar field with the substrate.…”

Section: 3a Nanoparticlesmentioning

confidence: 99%

Nanostructures for surface plasmons

Zhang

2012

Adv. Opt. Photon.

115

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Surface plasmons (SPs) are electromagnetic excitations existing at the interface between a metal and a dielectric material. Control and manipulation of light based on SPs at the nanometer scale offers significant advantages in nanophotonic devices with very small elements, since the peculiar properties of SPs can be tailored by construction of nanostructures with various interfaces between metals and dielectric materials. Recent progress in nanostructures for SPs is reviewed. Resonance frequencies or wavelengths of SPs can be tuned by design of metal nanostructures, such as nanoparticles, nanorods, nanowires, nanosheets, and nanodisks. Moreover, SP resonance modes can also be tuned by control of the shapes and sizes of nanostructures, where the resonance modes include longitudinal and transversal resonances, dipolar and multipolar resonances, and Fano resonances. Based on SP coupling for metal nanostructures, metal-semiconductor nanostructures, metal-dielectric nanostructures, and metal-polymer nanostructures, propagating and guiding of SP can be achieved through the metal nanostructures and the hybrid structures. Additionally, metal nanostructures exhibit remarkable field enhancement effects (e.g., local near-field enhancement, and optical transmission enhancement) due to SP coupling. Furthermore, SP nanostructures perform unique focusing and imaging characteristics at the nanometer scale beyond the diffraction limit. Tailoring SPs by control of the nanostructures is expected to be used for design and development of high-performance optical components and circuits, which offer both potential and challenges for new generations of nanophotonic devices.

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“…Both these requirements have the effect of red-shifting the plasmon resonance (see Refs. [36], and [27] respectively). This could be partly responsible for the result in Figure 7 that IQE enhancement via oblique scattering can only be achieved at the expense of unacceptable losses in transmission into the solar cell.…”

Section: A Requirements For Oblique Scattering Vs Requirements For Gmentioning

confidence: 99%

Nanoparticle Scattering for Multijunction Solar Cells: The Tradeoff Between Absorption Enhancement and Transmission Loss

Mellor¹,

Hylton²,

Hauser

et al. 2016

IEEE J. Photovoltaics

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Abstract-This paper contains a combined experimental and simulation study of the effect of Al and AlInP nanoparticles on the performance of multi-junction solar cells. In particular, we investigate oblique photon scattering by the nanoparticle arrays as a means of improving thinned subcells or those with low diffusion lengths, either inherently or due to radiation damage. Experimental results show the feasibility of integrating nanoparticle arrays into the ARCs of commercial InGaP/InGaAs/Ge solar cells, and computational results show that nanoparticle arrays can improve the internal quantum efficiency via optical path length enhancement. However, a design that improves the external quantum efficiency of a stateof-the-art cell has not been found, despite the large parameter space studied. We show a clear trade-off between oblique scattering and transmission loss, and present design principles and insights into how improvements can be made.

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Controlling Fano lineshapes in plasmon-mediated light coupling into a substrate

Cited by 67 publications

References 18 publications

Large-area soft-imprinted nanowire networks as light trapping transparent conductors

Large-area soft-imprinted nanowire networks as light trapping transparent conductors

Nanostructures for surface plasmons

Nanoparticle Scattering for Multijunction Solar Cells: The Tradeoff Between Absorption Enhancement and Transmission Loss

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