Light scattering under nanofocusing: Towards coherent nanoscopies

Mohammadi, Ahmad; Agio, Mario

doi:10.1016/j.optcom.2011.12.074

Cited by 8 publications

(9 citation statements)

References 72 publications

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“…This is different from the case of a laser pulses that propagate in a dispersive dielectric medium which experience pulse temporal broadening due to group velocity dispersion. This behavior has been also confirmed by means of numerical calculations by different authors [40,82,83].…”

Section: Excitation With Ultra-short Laser Pulsessupporting

confidence: 69%

“…Theoretical calculations have demonstrated that with direct coupling mechanism an overall efficiency as high as 70 % can be obtained. This result refer to a radially polarized beam focused at the base of the sharp 2 m long gold nanocone [82,83].…”

Section: Excitation With Ultra-short Laser Pulsesmentioning

confidence: 99%

“…Recent articles [82,83] have moreover proposed the use of this nano-focusing system to perform at the nanoscale more complex and powerful characterization, like multi-dimensional optical spectroscopy [89] to study molecular interaction at nanoscale and at single molecule level.…”

Section: Excitation With Ultra-short Laser Pulsesmentioning

confidence: 99%

See 2 more Smart Citations

Novel Plasmonic Probes and Smart Superhydrophobic Devices, New Tools for Forthcoming Spectroscopies at the Nanoscale

Giugni

Torre

Allione

et al. 2014

NATO Science for Peace and Security Series B: Physics and Biophysics

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In this work we review novel strategies and new physical effects to achieve compositional and structural recognition at single molecule level. This chapter is divided in two main parts. The first one introduces the strategies currently adopted to investigate matter at few molecules level. Exploiting the capability of surface plasmon polaritons to deliver optical excitation at nanoscale, we introduce a technique relying on a new transport phenomenon with chemical sensitivity and nanometer spatial resolution. The second part describes how micro and nanostructured superhydrofobic textures can concentrate and localize a small number of molecules into a well-defined region, even when only an extremely diluted solution is available. Several applications of these devices as micro- and nano-systems for high-resolution imaging techniques, cell cultures and tissue engineering applications are also discussed

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Section: Excitation With Ultra-short Laser Pulsessupporting

confidence: 69%

Section: Excitation With Ultra-short Laser Pulsesmentioning

confidence: 99%

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Novel Plasmonic Probes and Smart Superhydrophobic Devices, New Tools for Forthcoming Spectroscopies at the Nanoscale

Giugni

Torre

Allione

et al. 2014

NATO Science for Peace and Security Series B: Physics and Biophysics

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“…It is of great interest [1][2][3][4][5][6][7][8][9][10][11][12][13] to devise techniques for reducing this limit, however, so that one might be able to locally control the interaction of the field with two or more atoms that are separated in space by a distance much less than this diffraction limit. Early work [3][4][5] on subwavelength localization, as this effect is called, was based upon spatially varying perturbations, such as a Zeeman shift caused by an inhomogeneous magnetic field or the ac Stark shift caused by the intensity gradient of the spatial profile of a focused laser beam.…”

Section: Introductionmentioning

confidence: 99%

Influence of interaction time and population redistribution on the localization of atomic excitation through electromagnetically induced transparency

Choi

Elliott

2014

Phys. Rev. A

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We study numerically the localization of atomic excitation based on the dark states formed through electromagnetically induced transparency using interfering coupling beams. In particular, we examine the formation of dark states in a system exhibiting hyperfine splitting, including the effects of optical pumping in this multilevel system, laser polarization, and finite interaction time, and explore the conditions that lead to optimal spatial resolution of the excitation. We find that optimal localization requires long interaction times, due to the slow approach of the atomic system to steady state near the nodes of the standing wave pattern.

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“…21,22 However, instead of considering the extinction, absorption and scattering from first principle as done by Mohammadi and Agio, 22 we choose to follow this classical treatment as it enables a clearer discussion of SNRs.…”

mentioning

confidence: 99%

Sensitivity of Interferometric Cross-Polarization Microscopy for Nanoparticle Detection in the Near-Infrared

Miles¹,

Robinson²,

Dijk

et al. 2015

ACS Photonics

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ABSTRACT:We address the sensitivity of Interferometric Cross-Polarization Microscopy by comparing scattering and absorption by spherical 10 nm nanoparticles through a combination of modeling and experiment. We show that orthogonality of light in the two polarization branches of Cross-Polarization Microscopy ensures that only light that has interacted with a nanoparticle is interferometrically enhanced. As a result background-free shot noise-limited detection is achieved for sub-μW optical powers at the sample. Our modeling in particular shows that in the near-infrared regime, above the plasmon resonance frequency of spherical nanoparticles, the cross-polarization approach is several orders of magnitude more sensitive than conventional extinction based detection. This enhanced near-infrared sensitivity for spherical nanoparticles is promising for applications requiring low absorption and low power imaging of nanoparticles in cells.

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Light scattering under nanofocusing: Towards coherent nanoscopies

Cited by 8 publications

References 72 publications

Novel Plasmonic Probes and Smart Superhydrophobic Devices, New Tools for Forthcoming Spectroscopies at the Nanoscale

Novel Plasmonic Probes and Smart Superhydrophobic Devices, New Tools for Forthcoming Spectroscopies at the Nanoscale

Influence of interaction time and population redistribution on the localization of atomic excitation through electromagnetically induced transparency

Sensitivity of Interferometric Cross-Polarization Microscopy for Nanoparticle Detection in the Near-Infrared

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