Cascaded plasmonic metamaterials for phase-controlled enhancement of nonlinear absorption and refraction

Toroghi, Seyfollah; Kik, Pieter G.

doi:10.1103/physrevb.85.045432

Cited by 18 publications

(25 citation statements)

References 42 publications

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“…Alternatively, MNPs are intentionally placed within solar cells. MNPs (few nanometers in diameter) can scatter a wide range of visible light, and also can create high intensity near‐fields in their vicinity . However, light can face optical losses for small (few nanometer) MNPs that can supersede scattering.…”

Section: Introductionmentioning

confidence: 99%

High efficiency thin‐film amorphous silicon solar cells

Ghahremani

Fathy

2016

Energy Science & Engineering

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Enhancing light absorption within thin film amorphous silicon (a-Si) solar cells should lead to higher efficiency. This improvement is typically done using various light trapping techniques such as utilizing textured back reflectors for pronounced light scattering within the cell thus achieving higher absorption. It is believed that embedding metallic nanoparticles (MNPs) inside the structure could increase light scattering. However, embedding MNPs can also cause significant structure defects and pronounced efficiency drop as well -it has been indicated by many experiments that disproved this belief. In search of ways to improve efficiency, we have investigated the impact of MNP's size, and location within the solar cell, in addition to the effect of defects, and doping levels on the overall efficiency. On the basis of our 3D multiphysics (optical-electric) modeling, we developed a design guideline for embedding these MNPs and reducing the impact of defects created in the embedding process. The results of simulations were compared to relevant measured data, and it showed a good agreement. Subsequently, models were used to predict performance, and over 30% improvement in solar cell efficiency (~13% is predicted); which is beyond the state of the art. This was predicted by optimizing the size and location of the MNPs and tailoring the doping levels to have better forward light trapping and absorption. 335

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Section: Introductionmentioning

confidence: 99%

High efficiency thin‐film amorphous silicon solar cells

Ghahremani

Fathy

2016

Energy Science & Engineering

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“…This was discussed in detail in Ref. 32 and simulated maximum enhancement factor will also be reduced by introducing surface scattering (not shown here), which means experimentally the result may not be as large as we will show below if we use such small particles. Meanwhile, it will not influence the plasmon resonant wavelength which is quite important.…”

Section: Theory and Methodsmentioning

confidence: 67%

“…We assume that the nonlinear properties do not influence its linear electric field distribution, this is valid in many methods. 17,32,33 Figure 6 shows the complex L x dependent nonlinear susceptibility enhancement factor g (3) in calculated based on Eqs. (2.4) and (2.5) (Figs.…”

Section: Enhanced and Controllable Nonlinear Effects In Compositementioning

confidence: 99%

“…17,32 It will be difficult to observe nonlinearities of host in experiments, because they may be overshadowed by nonlinearities introduced by the metal inclusions. In our simulations however, the maximum local field enhancement occurring near the surface of the particles is much larger than that in the inclusion and also several orders larger than the spherical case (L x = 0.33), and compared to Ref.…”

Section: Enhanced and Controllable Nonlinear Effects In Compositementioning

confidence: 99%

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Enhanced and controllable nonlinear effects in composite with aligned gold spheroid arrays

Guo

Jiang

et al. 2015

J. Nonlinear Optic. Phys. Mat.

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The linear and nonlinear optical properties of composite containing aligned prolate spheroid nanoparticles embedded in a dielectric host are studied as a function of depolarization factor. It is shown that the effective third-order nonlinear susceptibility of the composite can be significantly enhanced with respect to the linear optical properties, due to a combination of varying nanoparticle shape and interparticle space. The susceptibility enhancement is up to four orders larger compared to the spherical case. The susceptibility enhancement of the host is finally comparable to the inclusion after choosing property structure parameters. The geometry-dependent susceptibility enhancement can lead to an improved figure of merit for nonlinear absorption.

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“…The LSPR shows promise in a variety of applications: Surface Enhanced Raman Spectroscopy (SERS), [1][2][3] Surface Enhanced Fluorescence, [4][5][6] Surface Enhanced second harmonic generation, 7,8 plasmon enhanced nonlinear refraction and absorption, 9,10 sensors, 11,12 photovoltaics, [13][14][15] and metamaterials. 16,17 The surface plasmon resonance frequency of metal nanostructures is sensitive to various parameters, e.g.…”

Section: Introductionmentioning

confidence: 99%

Voltage controlled nanoparticle plasmon resonance tuning through anodization

Lumdee

Kik

2012

SPIE Proceedings

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Frequency control of plasmon resonances is important for optical sensing applications such as Surface Enhanced Raman Spectroscopy. Prior studies that investigated substrate-based control of noble metal nanoparticle plasmon resonances mostly relied on metal substrates with organic or oxide spacer layers that provided a fixed resonance frequency after particle deposition. Here we present a new approach enabling continuous resonance tuning through controlled substrate anodization. Localized Surface Plasmon tuning of single gold nanoparticles on an Al film is observed in single-particle microscopy and spectroscopy experiments. Au nanoparticles (diameter 60 nm) are deposited on 100 nm thick Al films on silicon. Dark field microscopy reveals Au nanoparticles with a dipole moment perpendicular to the aluminum surface. Subsequently an Al 2 O 3 film is formed with voltage controlled thickness through anodization of the particle coated sample. Spectroscopy on the same particles before and after various anodization steps reveal a consistent blue shift as the oxide thickness is increased. The observed trends in the scattering peak position are explained as a voltage controlled interaction between the nanoparticles and the substrate. The experimental findings are found to closely match numerical simulations. The effects of particle size variation and spacer layer dielectric functions are investigated numerically. The presented approach could provide a post-fabrication frequency tuning step in a wide range of plasmonic devices, could enable the investigation of the optical response of metal nanostructures in a precisely controlled local environment, and could form the basis of chemically stable frequency optimized sensors.

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Cascaded plasmonic metamaterials for phase-controlled enhancement of nonlinear absorption and refraction

Cited by 18 publications

References 42 publications

High efficiency thin‐film amorphous silicon solar cells

High efficiency thin‐film amorphous silicon solar cells

Enhanced and controllable nonlinear effects in composite with aligned gold spheroid arrays

Voltage controlled nanoparticle plasmon resonance tuning through anodization

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