Shaping Emission Spectra of Fluorescent Molecules with Single Plasmonic Nanoresonators

Ringler, Moritz; Schwemer, A.; Wunderlich, Michael T.; Nichtl, Alfons; Kürzinger, Konrad; Klar, Thomas A.; Feldmann, Jochen

doi:10.1103/physrevlett.100.203002

Cited by 423 publications

(477 citation statements)

References 29 publications

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“…In general, the total PLE may be factored into its con- tributions from the pump and emission energies [4,10]. We have verified that the influence of resonant pump enhancements is negligible by exciting the sample with different k-vectors and/or polarizations.…”

mentioning

confidence: 87%

“…Coupled semiconductor nanocrystal quantum emitters and metallic nanostructures offer an ideal platform for this purpose [1][2][3]: the emission energy can be tuned by varying the nanocrystal size due to quantum confinement of charge carriers, while the emitted light can be enhanced and controlled by structuring the metal to sustain surface plasmon polaritons which are resonant with the emission. It has been shown that Localized Surface Plasmon Resonances (LSPRs) in metallic nanoparticles may lead to a strong confinement of optical radiation into subwavelength volumes, resulting in a drastic modification of the emission spectra [4], and radiative decay rates [5], of emitters in this volume. However, such strong effects depend on an accurate positioning of the emitter in the region where the large electromagnetic enhancements occur.…”

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confidence: 99%

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Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light

Rodriguez¹,

Lozano²,

Verschuuren³

et al. 2012

Appl. Phys. Lett.

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We demonstrate that an array of optical antennas may render a thin layer of randomly oriented semiconductor nanocrystals into an enhanced and highly directional source of polarized light. The array sustains collective plasmonic lattice resonances which are in spectral overlap with the emission of the nanocrystals over narrow angular regions. Consequently, different photon energies of visible light are enhanced and beamed into definite directions.The development of efficient and tunable (in photon energy, directionality, and polarization) nanoscale light emitters is a central goal for nanophotonics. Coupled semiconductor nanocrystal quantum emitters and metallic nanostructures offer an ideal platform for this purpose [1-3]: the emission energy can be tuned by varying the nanocrystal size due to quantum confinement of charge carriers, while the emitted light can be enhanced and controlled by structuring the metal to sustain surface plasmon polaritons which are resonant with the emission. It has been shown that Localized Surface Plasmon Resonances (LSPRs) in metallic nanoparticles may lead to a strong confinement of optical radiation into subwavelength volumes, resulting in a drastic modification of the emission spectra [4], and radiative decay rates [5], of emitters in this volume. However, such strong effects depend on an accurate positioning of the emitter in the region where the large electromagnetic enhancements occur. It is possible to overcome this position dependance by means of collective resonances in periodic arrays of metallic nanostructures. When a diffraction order is radiating in the plane of the array, i.e

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mentioning

confidence: 87%

mentioning

confidence: 99%

Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light

Rodriguez¹,

Lozano²,

Verschuuren³

et al. 2012

Appl. Phys. Lett.

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“…Linear molecular spectroscopies such as Raman and fluorescence have found their plasmonenhanced analogs in surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence; both are now routinely realized in the extreme limit of singlemolecule detection; see, e.g., Refs. [7,8,9,10]. And plasmon-enhanced versions of n-wave mixing and hyperRaman scattering [11,12], as well as other nonlinear spectroscopies, are rapidly being explored as ultrasensitive probes of molecular structure complementary to those linear.…”

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confidence: 99%

On the linear response and scattering of an interacting molecule-metal system

Masiello

Schatz

2010

The Journal of Chemical Physics

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A many-body Green's function approach to the microscopic theory of plasmon-enhanced spectroscopy is presented within the context of localized surface-plasmon resonance spectroscopy and applied to investigate the coupling between quantum-molecular and classical-plasmonic resonances in monolayer-coated silver nanoparticles. Electronic propagators or Green's functions, accounting for the repeated polarization interaction between a single molecule and its image in a nearby nanoscale metal, are explicitly computed and used to construct the linear-response properties of the combined molecule-metal system to an external electromagnetic perturbation. Shifting and finite lifetime of states appear rigorously and automatically within our approach and reveal an intricate coupling between molecule and metal not fully described by previous theories. Self-consistent incorporation of this quantum-molecular response into the continuum-electromagnetic scattering of the molecule-metal target is exploited to compute the localized surface-plasmon resonance wavelength shift with respect to the bare metal from first principles.Ever increasing experimental interest in a variety of plasmon-enhanced molecular spectroscopies has provided impetus for the development of a corresponding assortment of theoretical descriptions of these phenomena [1,2,3,4,5,6]. Linear molecular spectroscopies such as Raman and fluorescence have found their plasmonenhanced analogs in surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence; both are now routinely realized in the extreme limit of singlemolecule detection; see, e.g., Refs. [7,8,9,10]. And plasmon-enhanced versions of n-wave mixing and hyperRaman scattering [11,12], as well as other nonlinear spectroscopies, are rapidly being explored as ultrasensitive probes of molecular structure complementary to those linear. Conversely, spectroscopy of the plasmon itself, either localized to metal particles or propagating across metal surfaces [13], and embedded within a potentially resonant molecular environment [14,15] forms the basis for yet another promising direction of related research. Outside of the laboratory, the challenge remains to develop theories that are rich enough to describe the basic physics relevant to each, yet are simultaneously practical enough to implement numerically for real systems of current experimental interest.Here we present the first numerical implementation of a new and general many-body Green's function formalism that is capable of describing a variety of plasmonenhanced linear spectroscopies and apply it to model recent localized surface-plasmon resonance (LSPR) spectroscopy and molecular sensing experiments. LSPR spectroscopy is highly sensitive to the small refractive-index changes of the environment surrounding nanoscale metal particles and has been reported to detect the presence of as few as tens to hundreds of nearby molecules [16,17]. This sensitivity arises from the resonant coupling of incident light to the collective oscillation of conduction elect...

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“…Strongly coupled plasmonic nanostructures are particularly well suited to build biosensor-and spectroscopy devices as they have been shown to enhance Raman scattering and uorescence intensity and also shape the emission spectrum of single molecules that are positioned in the nanoantenna gap. [144][145][146] Nanoparticles optically trapped in a liquid at room temperature are subject to signicant Brownian motion. This motion is damped to a certain level by the strong gradient forces induced by the trapping laser.…”

Section: Manipulation Of Biomimetic and Biological Systemsmentioning

confidence: 99%

Optical trapping and manipulation of plasmonic nanoparticles: fundamentals, applications, and perspectives

et al. 2014

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This feature article discusses the optical trapping and manipulation of plasmonic nanoparticles, an area of current interest with potential applications in nanofabrication, sensing, analytics, biology and medicine. We give an overview over the basic theoretical concepts relating to optical forces, plasmon resonances and plasmonic heating. We discuss fundamental studies of plasmonic particles in optical traps and the temperature profiles around them. We place a particular emphasis on our own work employing optically trapped plasmonic nanoparticles towards nanofabrication, manipulation of biomimetic objects and sensing.

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Shaping Emission Spectra of Fluorescent Molecules with Single Plasmonic Nanoresonators

Cited by 423 publications

References 29 publications

Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light

Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light

On the linear response and scattering of an interacting molecule-metal system

Optical trapping and manipulation of plasmonic nanoparticles: fundamentals, applications, and perspectives

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