Tailor-made directional emission in nanoimprinted plasmonic-based light-emitting devices

Lozano, Gabriel; Grzela, Grzegorz; Verschuuren, Marc A.; Ramezani, Mohammad; Rivas, Jaime Gómez

doi:10.1039/c4nr01391c

Cited by 94 publications

(98 citation statements)

References 56 publications

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“…2(b)], with the effective waveguide mode index n eff = 1.525. For a period around 400 nm, enhanced forward emission takes place, like in previous reports [12,13]. For a period p = 275 nm, enhanced emission is seen for θ > 41°, which is the desired angular range for emission in glass with n = 1.52, in accordance with the above considerations.…”

Section: Methodssupporting

confidence: 71%

“…The shape and dimensions of the metallic particles can influence the emission characteristics to some extent [11], whereas the directions of emission are mainly determined by the array period and symmetry. In this respect, a hexagonal structure is more favorable than a square structure in case one desires a highly symmetric emission pattern [12]. These effects can be used for shaping the directionality of the emitted light at particular wavelength ranges, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Directional sideward emission from luminescent plasmonic nanostructures

Boer¹,

Verschuuren²,

Ke³

et al. 2016

Opt. Express

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Periodic arrays of metallic nanoparticles can be used to enhance the emission of light in certain directions. We fabricated hexagonal arrays of aluminium nanoparticles combined with thin layers of luminescent material and optimized period (275 nm) and thickness (1500 nm) to obtain sideward directional emission into glass for a wavelength band around 620 nm. The key physics is that the luminescent layer acts as a waveguide, from which light is emitted at preferential angles using diffractive effects. This phenomenon has applications in the field of solid-state lighting, where there is a desire for small, bright and directional sources.

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Section: Methodssupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Directional sideward emission from luminescent plasmonic nanostructures

Boer¹,

Verschuuren²,

Ke³

et al. 2016

Opt. Express

View full text Add to dashboard Cite

show abstract

“…1(b) a side view of the array is shown. The step around the apex of each particle is due to the two-step etching process applied during the fabrication procedure in order to etch the sol-gel mask on top of the aluminum layer [32,34].…”

Section: Fabrication Of Nanoparticle Array and Characterizationmentioning

confidence: 99%

Modified emission of extended light emitting layers by selective coupling to collective lattice resonances

et al. 2016

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We demonstrate that the coupling between light emitters in extended polymer layers and modes supported by arrays of plasmonic particles can be selectively enhanced by accurate positioning of the emitters in regions where the electric field intensity of a given mode is maximized. The enhancement, which we measure to reach up to 70%, is due to the improved spatial overlap and coupling between the optical mode and emitters. This improvement of the coupling leads to a modification of the emission spectrum and the luminous efficacy of the sample.

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“…The large enhancement in the forward emission is useful for improving the directional emission efficiency in solid state lighting applications. 28 FIG. 2.…”

Section: Fabrication and Characterization Of The Nanoantenna Phasmentioning

confidence: 99%

“…Antenna arrays provide extensive application prospects in areas such as solid-state lighting [26][27][28]43 and lasing. [29][30][31] The limiting factor for these applications are the absorption losses in the metal which, as we show below, can be mitigated by designing how the sample is illuminated.…”

Section: Introductionmentioning

confidence: 99%

Control of the external photoluminescent quantum yield of emitters coupled to nanoantenna phased arrays

Lozano

Verschuuren

et al. 2015

Journal of Applied Physics

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Optical losses in metals represent the largest limitation to the external quantum yield of emitters coupled to plasmonic antennas. These losses can be at the emission wavelength, but they can be more important at shorter wavelengths, i.e., at the excitation wavelength of the emitters, where the conductivity of metals is usually lower. We present accurate measurements of the absolute external photoluminescent quantum yield of a thin layer of emitting material deposited over a periodic nanoantenna phased array. Emission and absorptance measurements of the sample are performed using a custom-made setup including an integrating sphere and variable angle excitation. The measurements reveal a strong dependence of the external quantum yield on the angle at which the optical field excites the sample. Such behavior is attributed to the coupling between far-field illumination and near-field excitation mediated by the collective resonances supported by the array. Numerical simulations confirm that the inherent losses associated with the metal can be greatly reduced by selecting an optimum angle of illumination, which boosts the light conversion efficiency in the emitting layer. This combined experimental and numerical characterization of the emission from plasmonic arrays reveals the need to carefully design the illumination to achieve the maximum external quantum yield.

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Tailor-made directional emission in nanoimprinted plasmonic-based light-emitting devices

Cited by 94 publications

References 56 publications

Directional sideward emission from luminescent plasmonic nanostructures

Directional sideward emission from luminescent plasmonic nanostructures

Modified emission of extended light emitting layers by selective coupling to collective lattice resonances

Control of the external photoluminescent quantum yield of emitters coupled to nanoantenna phased arrays

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