Microsphere Assisted Super-resolution Optical Imaging of Plasmonic Interaction between Gold Nanoparticles

Hou, Beibei; Xie, Mengran; He, Ruoyu; Ji, Minhe; Trummer, Sonja; Fink, R.; Zhang, Luning

doi:10.1038/s41598-017-14193-3

Cited by 24 publications

(13 citation statements)

References 55 publications

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“…Often, however, these nanostructures are difficult to fabricate with low yield and high cost. Few studies have exploited nanorefractive elements (12), even though nanoscale spherical lenses are already known to be capable of focusing of light beyond the diffraction limit (13)(14)(15)(16) and can thus aid in directing incident light to optimally excite plasmonic hot spots.…”

mentioning

confidence: 99%

Cascaded nanooptics to probe microsecond atomic-scale phenomena

Kamp

Nijs

Kongsuwan

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Plasmonic nanostructures can focus light far below the diffraction limit, and the nearly thousandfold field enhancements obtained routinely enable few- and single-molecule detection. However, for processes happening on the molecular scale to be tracked with any relevant time resolution, the emission strengths need to be well beyond what current plasmonic devices provide. Here, we develop hybrid nanostructures incorporating both refractive and plasmonic optics, by creating SiO2nanospheres fused to plasmonic nanojunctions. Drastic improvements in Raman efficiencies are consistently achieved, with (single-wavelength) emissions reaching 107counts⋅mW−1⋅s−1and 5 × 105counts∙mW−1∙s−1∙molecule−1, for enhancement factors >1011. We demonstrate that such high efficiencies indeed enable tracking of single gold atoms and molecules with 17-µs time resolution, more than a thousandfold improvement over conventional high-performance plasmonic devices. Moreover, the obtained (integrated) megahertz count rates rival (even exceed) those of luminescent sources such as single-dye molecules and quantum dots, without bleaching or blinking.

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mentioning

confidence: 99%

Cascaded nanooptics to probe microsecond atomic-scale phenomena

Kamp

Nijs

Kongsuwan

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…The SP fields are excited when the momentum of the surface plasmon is equal to the EM wave vector component that is parallel to the surface plasmon plus the reciprocal lattice vectors of the holes in the metal as explained in earlier works [33][34][35]. For an array of holes in a thin film, the matching condition is given by In a study, microsphere assisted super-resolution optical imaging by plasmon interaction was reported [92]. Such interactions are, however, very complicated in general cases and can change the image in a way which is difficult to analyze.…”

Section: Point Spread Function and Plasmon Interaction In Microspherementioning

confidence: 99%

Super-Resolution of Nano-Materials and Quantum Effects Obtained by Microspheres

Ben‐Aryeh¹

2019

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In this article, microsphere super-resolution, which are beyond the Abbe classical limit, are described. The conversion of evanescent waves into propagating waves is analyzed by using the geometry of the microsphere. In microsphere experiments, a nanojet is produced near the focal plane, where its width is smaller than the Abbe limit and remains unchanged in the axial direction for certain wavelengths. The interference between the evanescent waves being converted into propagating waves and the nanojet leads to an increase in light intensity and confinement effects in the focal plane. However, the nanojet is not the main source of the super-resolution as the fine structures are available mainly in the evanescent waves. Quantum effects for super-resolution are obtained from special properties of the evanescent waves leading to an uncertainty relation. Several methods to increase the phase contrast in microsphere experiments have been described, which can be used for phase object measurements. Plasmon interaction can be used for measuring fine structures of special systems and for converting evanescent waves into propagating waves but they might also change the optical image in a way which is difficult to analyze. Therefore, most microsphere high-resolution experiments were conducted without plasmon interactions.

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“…Currently, most microsphere-assisted imaging methods use high-refractive-index microspheres in a liquid environment [13][14][15][16][17]. Nevertheless, the imaging performance of the microspheres can be affected by the shape of air-liquid interfaces as well as the refractive index distribution of liquid films.…”

Section: Introductionmentioning

confidence: 99%

Super-Resolution Imaging with Patchy Microspheres

Shang

Tang

et al. 2021

Photonics

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The diffraction limit is a fundamental barrier in optical microscopy, which restricts the smallest resolvable feature size of a microscopic system. Microsphere-based microscopy has proven to be a promising tool for challenging the diffraction limit. Nevertheless, the microspheres have a low imaging contrast in air, which hinders the application of this technique. In this work, we demonstrate that this challenge can be effectively overcome by using partially Ag-plated microspheres. The deposited Ag film acts as an aperture stop that blocks a portion of the incident beam, forming a photonic hook and an oblique near-field illumination. Such a photonic hook significantly enhanced the imaging contrast of the system, as experimentally verified by imaging the Blu-ray disc surface and colloidal particle arrays.

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Microsphere Assisted Super-resolution Optical Imaging of Plasmonic Interaction between Gold Nanoparticles

Cited by 24 publications

References 55 publications

Cascaded nanooptics to probe microsecond atomic-scale phenomena

Cascaded nanooptics to probe microsecond atomic-scale phenomena

Super-Resolution of Nano-Materials and Quantum Effects Obtained by Microspheres

Super-Resolution Imaging with Patchy Microspheres

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