Resolution and Enhancement in Nanoantenna-Based Fluorescence Microscopy

Eghlidi, Hadi; Lee, Kwang Geol; Chen, Xue-Wen; Götzinger, Stephan; Sandoghdar, Vahid

doi:10.1021/nl902183y

Cited by 64 publications

(65 citation statements)

References 28 publications

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“…1i). We note in passing that the observed enhancement is weaker than our previous studies [11,12] by an order of magnitude because here the nanoparticle is also inside the pT film, where the LDOS is diminished, leading to weaker scattering and radiation [12,26].…”

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confidence: 67%

“…About a decade ago, we addressed these difficulties by introducing a scannable nanoantenna, consisting of a single plasmonic nanosphere attached to the end of a dielectric tip [8,9]. The simple and symmetric form of the spherical nano-antenna and the in-situ nanometric position control provided by scanning probe technology have opened the door to quantitative measurements and comparison with theory [10][11][12][13].…”

mentioning

confidence: 99%

“…As we recently pointed out, the presence of a dielectric interface can considerably affect the interaction between the emitter and the plasmonic antenna [12,26]. To take this and the effect of the tip shaft into account, we have performed rigorous body of revolution nanoparticles (see Fig.…”

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confidence: 99%

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Spontaneous emission enhancement of a single molecule by a double-sphere nanoantenna across an interface

Lee¹,

Eghlidi²,

Chen³

et al. 2012

Opt. Express

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We report on two orders of magnitude reduction in the fluorescence lifetime when a single molecule placed in a thin film is surrounded by two gold nanospheres across the film interface. By attaching one of the gold particles to the end of a glass fiber tip, we could control the modification of the molecular fluorescence at will. We find a good agreement between our experimental data and the outcome of numerical calculations.

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confidence: 67%

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confidence: 99%

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Spontaneous emission enhancement of a single molecule by a double-sphere nanoantenna across an interface

Lee¹,

Eghlidi²,

Chen³

et al. 2012

Opt. Express

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“…The re-radiation of light at the same incident wavelength, referred to as plasmon scatter, is widely used in tip enhanced near field optical microscopy (TEONM) as nanosources for improved imaging spatial resolution and surface enhanced Raman scattering [1,2], or optical tweezers for manipulation of submicron particles and biomolecules [3].…”

Section: Introductionmentioning

confidence: 99%

Efficient excitation of surface plasmons in metal nanorods using large longitudinal component of high index nano fibers

2011

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“…Motivated by the recent progress in the observation of very large enhancement in spontaneous emission [17][18][19][20][21][22][23][24], we propose the existence of giant SHEL in single photon plasmonics. Especially fabricated plasmonic structures (PS) [25,26] have been shown to be especially suitable for enhancement of fluorescence.…”

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confidence: 99%

Highly nonparaxial spin Hall effect and its enhancement by plasmonic structures

Agarwal

Biehs

2013

Opt. Lett.

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We show the existence of a very large spin Hall effect of light (SHEL) in single photon plasmonics based on spontaneous emission and the dipole-dipole interaction initiated energy transfer (FRET) on plasmonic platforms. The spin orbit coupling inherent in Maxwell equations is seen in the conversion of σ + photon to σ − photon. The FRET is mediated by the resonant surface plasmons and hence we find very large SHEL. We present explicit results for SHEL on both graphene and metal films. We also study how the splitting of the surface plasmon on a metal film affects the SHEL. In contrast to most other works which deal with SHEL as correction to the paraxial results, we consider SHEL in the near field of dipoles which are far from paraxial.In recent years the SHEL has attracted considerable attention [1][2][3][4]. Several experiments have confirmed the existence of the effect [5][6][7][8][9][10]. The simplest version of the effect is known as Federov-Imbert effect [11][12][13] and is seen prominently as a polarization dependent transverse shift on the reflected beam at a dielectric interface. The shift occurs relative to the prediction of geometrical optics. The light beam is known to carry both orbital and spin angular momentum [14,15] and the spin-orbit coupling is inherent in the vectorial Maxwell equations. When light travels across the interface between the two dielectrics then the orbital angular momentum changes which then implies change in the polarization so that the total angular momentum is conserved [16]. The magnitude of the shift is generally quite small. However, for reflection from metal surfaces shifts of the order of wavelength have been reported [9]. The metallic gratings even yield larger result [8] due to excitation of surface plasmons. The SHEL appears in a variety of other ways [2,5,7].Motivated by the recent progress in the observation of very large enhancement in spontaneous emission [17][18][19][20][21][22][23][24], we propose the existence of giant SHEL in single photon plasmonics. Especially fabricated plasmonic structures (PS) [25,26] have been shown to be especially suitable for enhancement of fluorescence. We consider the Förster energy transfer [27,28] between two atoms located on a plasmonic surface. The energy transfer is mediated by plasmons. The SHEL arises as we demonstrate as a clear conversion of a, say, σ + photon into a σ − photon which is absorbed by the second atom leading to preparation of the second atom in a state which is orthogonally polarized to the state of the atom which produced the photon in the first place. The conversion is accompanied by the generation of the two units of orbital angular momentum. The giant SHEL can be detected by monitoring the population of the orthogonally polarized excited state of the second atom. We trace the existence of the effect to the fact that the dipole field is far from a paraxial field and in fact contains all the Fourier components including the evanescent waves. It has been shown that the image of a dipole in far field is displac...

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Resolution and Enhancement in Nanoantenna-Based Fluorescence Microscopy

Cited by 64 publications

References 28 publications

Spontaneous emission enhancement of a single molecule by a double-sphere nanoantenna across an interface

Spontaneous emission enhancement of a single molecule by a double-sphere nanoantenna across an interface

Efficient excitation of surface plasmons in metal nanorods using large longitudinal component of high index nano fibers

Highly nonparaxial spin Hall effect and its enhancement by plasmonic structures

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