Enhanced evanescent coupling to whispering-gallery modes due to gold nanorods grown on the microresonator surface

Shopova, Siyka I.; Blackledge, Charles W.; Rosenberger, A. T.

doi:10.1007/s00340-008-3180-6

Cited by 33 publications

(32 citation statements)

References 17 publications

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“…In other demonstrations, the high field strengths of WGMs [214, 215] as well as WGMs coupled to nanoparticles were used to enhance the far-field SERS scattering signal [216], without any utility in boosting the actual WGM frequency shift signal, however. Furthermore, enhanced evanescent coupling to a WGM with the help of a plasmonic nanoparticle has been reported [217]. Interestingly, hybrid photonic plasmonic microcavity structures promise ultra high sensitivity not only in biosensing but also in cavity-QED experiments [213].…”

Section: Enhancement Mechanisms By Localizing the Resonant Light Fmentioning

confidence: 99%

Review Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices

2012

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Optical microcavities that confine light in high-Q resonance promise all of the capabilities required for a successful next-generation microsystem biodetection technology. Label-free detection down to single molecules as well as operation in aqueous environments can be integrated cost-effectively on microchips, together with other photonic components, as well as electronic ones. We provide a comprehensive review of the sensing mechanisms utilized in this emerging field, their physics, engineering and material science aspects, and their application to nanoparticle analysis and biomolecular detection. We survey the most recent developments such as the use of mode splitting for self-referenced measurements, plasmonic nanoantennas for signal enhancements, the use of optical force for nanoparticle manipulation as well as the design of active devices for ultra-sensitive detection. Furthermore, we provide an outlook on the exciting capabilities of functionalized high-Q microcavities in the life sciences.

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Section: Enhancement Mechanisms By Localizing the Resonant Light Fmentioning

confidence: 99%

Review Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices

2012

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“…While this can be accomplished -in principle -by directly attaching noble metal nanoparticles to a dielectric resonator [49][50][51][52][53], this approach is very limited in scope as it does not provide control over the location and, in the case of anisotropic nanoparticles, orientation of the noble metal nanoparticles. Geometric control over the positioning of nanoparticles is crucial, in particular, for a successful integration of the optoplasmonic structures into an on-chip platform.…”

Section: Discrete Optoplasmonic Atoms and Moleculesmentioning

confidence: 99%

Template-Guided Self-Assembly of Discrete Optoplasmonic Molecules and Extended Optoplasmonic Arrays

et al. 2015

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Abstract:The integration of metallic and dielectric building blocks into optoplasmonic structures creates new electromagnetic systems in which plasmonic and photonic modes can interact in the near-, intermediate-and farfield. The morphology-dependent electromagnetic coupling between the different building blocks in these hybrid structures provides a multitude of opportunities for controlling electromagnetic fields in both spatial and frequency domain as well as for engineering the phase landscape and the local density of optical states. Control over any of these properties requires, however, rational fabrication approaches for well-defined metal-dielectric hybrid structures. Template-guided self-assembly is a versatile fabrication method capable of integrating metallic and dielectric components into discrete optoplasmonic structures, arrays, or metasurfaces. The structural flexibility provided by the approach is illustrated by two representative implementations of optoplasmonic materials discussed in this review. In optoplasmonic atoms or molecules optical microcavities (OMs) serve as whispering gallery mode resonators that provide a discrete photonic mode spectrum to interact with plasmonic nanostructures contained in the evanescent fields of the OMs. In extended hetero-nanoparticle arrays in-plane scattered light induces geometry-dependent photonic resonances that mix with the localized surface plasmon resonances of the metal nanoparticles. We characterize the fundamental electromagnetic working principles underlying both optoplasmonic approaches and review the fabrication strategies implemented to realize them.

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“…Optoplasmonic molecules are also particularly interesting for sensing applications since the formation of photonic-plasmonic hybrid resonances is expected to lead to a redistribution of the light between the photonic and plasmonic components. The formation of hybridized photonic-plasmonic modes could lead to significant E-field intensity localization outside of the volume of the optical microcavity in the vicinity of the plasmonic antennas where it is accessible for interactions with analytes.Previous approaches at realizing discrete optoplasmonic structures were either based on a direct attachment of noble metal nanoparticles onto the optical microcavity [8,12], on a direct contacting of plasmonic antennas through mechanically supported optical microcavities [13], or through an in situ formation through trapping of gold nanoparticles in the high E-field surrounding the optical microcavity [10]. While these approaches have great merit for their respective applications, they are limited in scope and do not allow for a miniaturization or on-chip integration of optoplasmonic elements, which is required for generating structurally complex networks.…”

mentioning

confidence: 99%

“…Previous approaches at realizing discrete optoplasmonic structures were either based on a direct attachment of noble metal nanoparticles onto the optical microcavity [8,12], on a direct contacting of plasmonic antennas through mechanically supported optical microcavities [13], or through an in situ formation through trapping of gold nanoparticles in the high E-field surrounding the optical microcavity [10]. While these approaches have great merit for their respective applications, they are limited in scope and do not allow for a miniaturization or on-chip integration of optoplasmonic elements, which is required for generating structurally complex networks.…”

mentioning

confidence: 99%

On-chip integrated optoplasmonic molecules and superlenses

Ahn

Boriskina

Yan

et al. 2012

2012 14th International Conference on Transparent Optical Networks (ICTON)

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In this paper we summarize our recent advances in the design and fabrication of optoplasmonic molecules and superlenses. These structures contain specific numbers of optical microcavity resonators and noble metal nanoparticles in well defined geometries enabling electromagnetic interactions between the photonic and plasmonic components. These optoplasmonic structures were fabricated using a novel template assisted fabrication approach that facilitates a convenient positioning of noble metal nanoparticles into the equatorial plane of whispering gallery mode resonators. The near-and far-field properties of the fabricated structures were characterized using scattering spectroscopy and generalized multiple particle Mie theory (GMT) simulations.Light can induce electron density oscillations in plasmonic nanostructures which makes them attractive material for bridging the gap between photonics and electronics to enable information and energy processing on nanometer length scales [1,2]. Important functionalities, such as active nanoscale field modulation, spatial field control, frequency switching, and reversible energy transfer between photons, plasmons, and nanoscale emitters are, however, still very difficult to realize with conventional plasmonic circuitry. Theoretical studies by us [3][4][5] and others [6][7][8][9][10][11] have shown that the combination of high-Q optical microcavity resonators and plasmonic nanostructures provide unique opportunities for overcoming some of the challenges associated with realizing these functionalities. We have previously introduced an optoplasmonic superlens that comprises two nanoparticle dimer antennas located in the evanescent field of an optical microcavity [4]. We demonstrated through theoretical analysis that the combination of subwavelength E-field confinement through plasmonic nanoantennas with long photon dwelling times in high-Q optical microcavities in this structure facilitates cascaded photon-emitter interactions over long length scales (up to hundreds of m). Further functionalities, such as multiplexing and demultiplexing are possible in optoplasmonic molecules comprising multiple optical microcavity resonators and plasmonic antennas in defined geometries [4]. Optoplasmonic molecules are also particularly interesting for sensing applications since the formation of photonic-plasmonic hybrid resonances is expected to lead to a redistribution of the light between the photonic and plasmonic components. The formation of hybridized photonic-plasmonic modes could lead to significant E-field intensity localization outside of the volume of the optical microcavity in the vicinity of the plasmonic antennas where it is accessible for interactions with analytes.Previous approaches at realizing discrete optoplasmonic structures were either based on a direct attachment of noble metal nanoparticles onto the optical microcavity [8,12], on a direct contacting of plasmonic antennas through mechanically supported optical microcavities [13], or through an in situ formation through trappi...

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Enhanced evanescent coupling to whispering-gallery modes due to gold nanorods grown on the microresonator surface

Cited by 33 publications

References 17 publications

Review Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices

Review Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices

Template-Guided Self-Assembly of Discrete Optoplasmonic Molecules and Extended Optoplasmonic Arrays

On-chip integrated optoplasmonic molecules and superlenses

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