Directional sideward emission from luminescent plasmonic nanostructures

Boer, Dick K. G. de; Verschuuren, Marc A.; Ke, Guo; Koenderink, A. Femius; Rivas, Jaime Gómez; Rodriguez, S. R. K.

doi:10.1364/oe.24.00a388

Cited by 9 publications

(9 citation statements)

References 20 publications

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“…To compare these experimental findings with theory, we performed numerical simulations of the emission patterns. The chosen approach is based on the reciprocity principle, , allowing us to take into account the periodicity of the structure, the substrate, and the spatial distribution of the emitters. We assumed that the emission of the glass substrate can be represented by point-like electric dipole emitters, which are randomly oriented and homogeneously distributed within the glass substrate.…”

Section: Resultsmentioning

confidence: 99%

Directional and Spectral Shaping of Light Emission with Mie-Resonant Silicon Nanoantenna Arrays

et al. 2018

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We study light emission from square arrays of Mie-resonant silicon nanoantennas situated on a fluorescent glass substrate. When the spectral positions of the silicon nanoantennas' resonances overlap with the intrinsic emission from the glass, the emission is selectively enhanced for certain spectral and spatial frequencies detemined by the design of the nanoantenna array. We measure the emission spectra of the coupled system for a systematic variation of the nanoantenna geometry, showing that the spectral maximum of the emission coincides with the antenna resonance positions observed in linear-optical transmittance spectra. Furthermore, we study the directionality of the emission by back focal plane imaging and numerical calculations based on the Fourier modal method and the reciprocity principle. We observe that the nanoantenna array induces a reshaping of the resonantly enhanced emission in the air half-space into a narrow lobe directed out of the substrate plane. This reshaping is explained by coherent scattering of the emitted light in the nanoantenna array. Our results demonstrate that combining emission enhancement by magnetic dipolar Mie-type resonances of silicon nanoantennas with diffractive coupling in the periodic arrangement allows for the creation of flat light sources with tailored spectral and directional emission properties.

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Section: Resultsmentioning

confidence: 99%

Directional and Spectral Shaping of Light Emission with Mie-Resonant Silicon Nanoantenna Arrays

et al. 2018

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“…[3][4][5][6][7][8] Periodic arrays of metallic nanoparticles on transparent substrates and their complementary structures, i.e., periodic nanohole arrays etched in metallic layers, have been widely studied for their unique optical properties. 9 These properties include the existence of spectrally sharp collective optical resonances, [10][11][12][13][14][15][16][17] the ability to control spontaneous emission, [18][19][20][21] the ability to disperse 22 and focus light, 23,24 the ability to support lasing, 25,26 and the extraordinary transmission of light through nanohole arrays. 27,28 Numerous applications of nanoparticles and nanohole arrays as chemical and biological sensors have been described in the recent literature.…”

Section: Introductionmentioning

confidence: 99%

“…In several of the most recent publications cited above, 18,20,21,25,26,[42][43][44] k-space optical microscopy is key in the elucidation of the investigated physical mechanisms. Recently, it has also been reported that k-space optical microscopy may be used to take advantage of a previously disregarded artifact from microscope objectives, called the "condenser effect," in order to resolve the geometry of periodic nanoparticle arrays beyond the optical diffraction limit.…”

Section: Introductionmentioning

confidence: 99%

k-space optical microscopy of nanoparticle arrays: Opportunities and artifacts

Bryche

Barbillon

Bartenlian

et al. 2018

Journal of Applied Physics

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We report on the performance and inherent artifacts of k-space optical microscopy for the study of periodic arrays of nanoparticles under the various illumination configurations available on an inverted optical microscope. We focus on the origin of these artifacts and the ways to overcome or even benefit from them. In particular, a recently reported artifact, called the "condenser effect," is demonstrated here in a new way. The consequences of this artifact (which is due to spurious reflections in the objective) on Fourier-space imaging and spectroscopic measurements are analyzed in detail. The advantages of using k-space optical microscopy to determine the optical band structure of plasmonic arrays and to perform surface plasmon resonance experiments are demonstrated. Potential applications of k-space imaging for the accurate lateral and axial positioning of the sample in optical microscopy are investigated.

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“…The natures of the resonant modes were rigorously analyzed with the multipole decomposition theory, − which was exploited to examine the selective coupling between the emitter and the nanoantenna. The far field radiation pattern was carefully studied not only for a single fluorescence emitter to explore the physical insight but also for an assembly of random-oriented incoherent emitters via the reciprocity principle − to better mimic realistic situations. The resultant excitation rate, quantum yield, radiative/nonradiative decay rate, fluorescence enhancement factor, and collection efficiency were thoroughly investigated to evaluate the performance of the hybrid mushroom nanoantenna.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Mushroom Nanoantenna for Fluorescence Enhancement by Matching the Stokes Shift of the Emitter

Sun

et al. 2018

J. Phys. Chem. C

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Nanoantenna-enhanced fluorescence is a promising method in many emergent applications, such as single molecule detection. The excitation and emission wavelengths of emitters can be well separated depending on the corresponding Stokes shifts, preventing optimal fluorescence enhancement by a rudimentary nanoantenna. We illustrate a hybrid mushroom nanoantenna that can achieve overall enhancements (e.g., excitation rate, quantum yield, fluorescence enhancement) in fluorescence emission. The nanoantenna is made of a plasmonic metal stipe and a dielectric cap, and the resonances can be flexibly and independently controlled to match the Stokes shift of the emitter. By fully leveraging the advantages of the large field enhancement from the metal and the low loss feature from the dielectric, a fluorescence enhancement factor (far field intensity) twice (20 times) as high as that from a pure metallic antenna can be attained, accompanied by improved directivity. Approximately 70% of the overall radiation was directed toward the mushroom cap via coupling to the dielectric resonance, which could benefit the collection efficiency. This hybrid concept introduces a way to build high-performance nanoantennas for fluorescence enhancement applications.

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Directional sideward emission from luminescent plasmonic nanostructures

Cited by 9 publications

References 20 publications

Directional and Spectral Shaping of Light Emission with Mie-Resonant Silicon Nanoantenna Arrays

Directional and Spectral Shaping of Light Emission with Mie-Resonant Silicon Nanoantenna Arrays

k-space optical microscopy of nanoparticle arrays: Opportunities and artifacts

Hybrid Mushroom Nanoantenna for Fluorescence Enhancement by Matching the Stokes Shift of the Emitter

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