Improved tip performance for scanning near-field optical microscopy by the attachment of a single gold nanoparticle

Sqalli, O.; Bernal, Maria–Pilar; Hoffmann, P.; Marquis‐Weible, F.

doi:10.1063/1.126277

Cited by 56 publications

(32 citation statements)

References 11 publications

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“…This may be related to the fact that the smaller the aperture, the larger the portion of the evanescent component in the light out of the SNOM probe and, thus, the more efficient the excitation of SPPs. And the fact that Au coating on the probe apex shows the highest efficiency of EM energy transportation is also consistent with the previous experimental result of Kim et al, which suggested that Au or Ag coating on the SNOM probe apex enhances the efficiency of SPP excitation (Kim et al, 2003a;Sqalli et al, 2000).…”

supporting

confidence: 90%

Use of a near‐field optical probe to locally launch surface plasmon polaritons on plasmonic waveguides: A study by the finite difference time domain method

Hwang

Kwon

Kim

2004

Microscopy Res & Technique

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We used the finite difference time domain (FDTD) method to study the use of scanning near field optical microscopy (SNOM) to locally excite the nanometric plasmonic waveguides. In our calculation, the light is funneled through a SNOM probe with a sub-wavelength optical aperture and is irradiated on one end of two types of plasmonic waveguides made of 50 nm Au sphere arrays and Au nanowires. The incident light was well localized at one end of the waveguides and consequently propagated toward the other end, due to the excitation of surface plasmon polaritons. We found that the propagation length of the nanosphere array type waveguide varies from 100 to 130 nm depending on the light wavelength, the size of the probe aperture, and the launching heights. Our result shows that reducing the aperture size and using the light of the plasmon resonance wavelength of the nanosphere array could increase the propagation length and, thus, the efficiency of electromagnetic energy transportation through nanosphere arrays.

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supporting

confidence: 90%

Use of a near‐field optical probe to locally launch surface plasmon polaritons on plasmonic waveguides: A study by the finite difference time domain method

Hwang

Kwon

Kim

2004

Microscopy Res & Technique

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“…Such phenomena could lead to a material selective trapping. It will also be interesting to explore the possibility of trapping a small gold particle, a few nanometers in size, and use it as a highly localized probe for topographic or spectroscopic studies 29,30 .…”

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confidence: 99%

Selective nanomanipulation using optical forces

2002

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We present a detailed theoretical study of the recent proposal for selective nanomanipulation of nanometric particles above a substrate using near-field optical forces [Chaumet et al. Phys. Rev. Lett. 88, 123601 (2002)]. Evanescent light scattering at the apex of an apertureless near-field probe is used to create an optical trap. The position of the trap is controlled on a nanometric scale via the probe and small objects can be selectively trapped and manipulated. We discuss the influence of the geometry of the particles and the probe on the efficiency of the trap. We also consider the influence of multiple scattering among the particles on the substrate and its effect on the robustness of the trap.

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“…4,5 Recently a very innovative design that combines nearfield optical probes with a cantilever ͓atomic force microscopy-scanning near field optical microscopy ͑SNOM͒ hybrid probes͔ has been proposed. In this approach, the probes comprise a 12 m high amorphous SiO 2 conical nearfield tip on a silicon cantilever.…”

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confidence: 99%

Propagation of the electromagnetic field in fully coated near-field optical probes

Vaccaro

Aeschimann

Staufer

et al. 2003

Applied Physics Letters

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Fully metal-coated near-field optical probes, based on a cantilever design, have been studied theoretically and experimentally. Numerical simulations prove that these structures allow nonzero modal emission of the electromagnetic field through a 60-nm-thick metallic layer, that is opaque when deposited on flat substrates. The far-field intensity patterns recorded experimentally correspond to the ones calculated for the fundamental and first excited LP modes. Moreover, this study demonstrates that a high confinement of the electromagnetic energy can be reached in the near-field, when illuminated with radially polarized light. Finally, it was verified that the confinement of the field depends on the volume of the probe apex.Nearly 20 years of intensive research in near-field optical microscopy have produced satisfying results in imaging and subwavelength resolution. 1

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Improved tip performance for scanning near-field optical microscopy by the attachment of a single gold nanoparticle

Cited by 56 publications

References 11 publications

Use of a near‐field optical probe to locally launch surface plasmon polaritons on plasmonic waveguides: A study by the finite difference time domain method

Use of a near‐field optical probe to locally launch surface plasmon polaritons on plasmonic waveguides: A study by the finite difference time domain method

Selective nanomanipulation using optical forces

Propagation of the electromagnetic field in fully coated near-field optical probes

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