scholarly journals Facilitating Hotspot Alignment in Tip-Enhanced Raman Spectroscopy via the Silver Photoluminescence of the Probe

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6687
Author(s):  
Yuan Fan ◽  
Dan Jin ◽  
Xiuju Wu ◽  
Hui Fang ◽  
Xiaocong Yuan
Keyword(s):  
Raman Spectroscopy ◽  
Plasmon Resonance ◽  
Near Field ◽  
Resonance Wavelength ◽  
Dark Field ◽  
Intensity Change ◽  
Localized Surface Plasmon ◽  
Excitation Wavelength ◽  
Alignment Procedure ◽  
Tip Enhanced Raman Spectroscopy

A tip-enhanced Raman spectroscopy (TERS) system based on an atomic force microscope (AFM) and radially polarized laser beam was developed. A TERS probe with plasmon resonance wavelength matching the excitation wavelength was prepared with the help of dark-field micrographs. The intrinsic photoluminescence (PL) from the silver (Ag)-coated TERS probe induced by localized surface plasmon resonance contains information about the near-field enhanced electromagnetic field intensity of the probe. Therefore, we used the intensity change of Ag PL to evaluate the stability of the Ag-coated probe during TERS experiments. Tracking the Ag PL of the TERS probe was helpful to detect probe damage and hotspot alignment. Our setup was successfully used for the TERS imaging of single-walled carbon nanotubes, which demonstrated that the Ag PL of the TERS probe is a good criterion to assist in the hotspot alignment procedure required for TERS experiments. This method lowers the risk of contamination and damage of the precious TERS probe, making it worthwhile for wide adoption in TERS experiments.

Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

2021 ◽  
Author(s):  
Jiawei Zhang ◽  
Gitanjali Kolhatkar ◽  
Andreas Ruediger
Keyword(s):  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Localized Surface Plasmon ◽  
Resonance Shift ◽  
Raman Modes ◽  
Tip Enhanced Raman Spectroscopy

The localized surface plasmon resonance (LSPR) position in tip-enhanced Raman spectroscopy (TERS) is of great importance to the understanding and interpretation of the relative intensity of different enhanced Raman modes....

scholarly journals Sample induced intensity variations of localized surface plasmon resonance in tip-enhanced Raman spectroscopy

2020 ◽  
Vol 28 (18) ◽  
pp. 25998
Author(s):  
Jiawei Zhang ◽  
Azza Hadj Youssef ◽  
Andreas Dörfler ◽  
Gitanjali Kolhatkar ◽  
Alexandre Merlen ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Tip Enhanced Raman Spectroscopy

scholarly journals Plasmonic nano-aperture label-free imaging (PANORAMA)

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Nareg Ohannesian ◽  
Ibrahim Misbah ◽  
Steven H. Lin ◽  
Wei-Chuan Shih
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Near Field ◽  
Dark Field ◽  
Localized Surface Plasmon ◽  
Wide Field ◽  
Label Free ◽  
Surface Sensitivity ◽  
Surface Localization

AbstractLabel-free optical imaging of nanoscale objects faces fundamental challenges. Techniques based on propagating surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) have shown promises. However, challenges remain to achieve diffraction-limited resolution and better surface localization in SPR imaging. LSPR imaging with dark-field microscopy on metallic nanostructures suffers from low light throughput and insufficient imaging capacity. Here we show ultra-near-field index modulated PlAsmonic NanO-apeRture lAbel-free iMAging (PANORAMA) which uniquely relies on unscattered light to detect sub-100 nm dielectric nanoparticles. PANORAMA provides diffraction-limited resolution, higher surface sensitivity, and wide-field imaging with dense spatial sampling. Its system is identical to a standard bright-field microscope with a lamp and a camera – no laser or interferometry is needed. In a parallel fashion, PANORAMA can detect, count and size individual dielectric nanoparticles beyond 25 nm, and dynamically monitor their distance to the plasmonic surface at millisecond timescale.

High-resolution Raman imaging of bundles of single-walled carbon nanotubes by tip-enhanced Raman spectroscopy

2015 ◽  
Vol 93 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Nastaran Kazemi-Zanjani ◽  
Pierangelo Gobbo ◽  
Ziyan Zhu ◽  
Mark S. Workentin ◽  
François Lagugné-Labarthet
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Near Field ◽  
Numerical Aperture ◽  
Single Walled Carbon Nanotubes ◽  
Localized Surface Plasmon ◽  
Glass Coverslip ◽  
Single Walled Carbon ◽  
Tip Enhanced Raman Spectroscopy ◽  
Walled Carbon Nanotubes

Bundles of single-walled carbon nanotubes (SWCNTs) prepared by plasma torch method and further purified, are deposited over a glass coverslip to estimate the spatial resolution of tip-enhanced Raman spectroscopy measurements. For this purpose, near-field Raman maps and spectra of isolated bundles of carbon nanotubes are collected using optimized experimental conditions such as a tightly focused beam using a 1.4 numerical aperture oil immersion microscope objective and a gold coated atomic force microscope probe illuminated by a radially polarized 632.8 nm wavelength to selectively excite the localized surface plasmon confined at the extremity of the tip. The near-field nature of the collected Raman signals is evaluated through measuring the decay of the Raman signal with respect to the tip-sample separation.

scholarly journals Double-resonant enhancement of third-harmonic generation in graphene nanostructures

2017 ◽  
Vol 375 (2090) ◽  
pp. 20160313 ◽  
Author(s):  
Jian Wei You ◽  
Jie You ◽  
Martin Weismann ◽  
Nicolae C. Panoiu
Keyword(s):  
Harmonic Generation ◽  
Spectral Response ◽  
Near Field ◽  
Field Enhancement ◽  
Third Harmonic Generation ◽  
Resonance Wavelength ◽  
Localized Surface Plasmon ◽  
Third Harmonic ◽  
New Horizons ◽  
Geometry Dependence

Intriguing and unusual physical properties of graphene offer remarkable potential for advanced, photonics-related technological applications, particularly in the area of nonlinear optics at the deep-subwavelength scale. In this study, we use a recently developed numerical method to illustrate an efficient mechanism that can lead to orders of magnitude enhancement of the third-harmonic generation in graphene diffraction gratings. In particular, we demonstrate that by taking advantage of the geometry dependence of the resonance wavelength of localized surface-plasmon polaritons of graphene ribbons and discs one can engineer the spectral response of graphene gratings so that strong plasmonic resonances exist at both the fundamental frequency and third-harmonic (TH). As a result of this double-resonant mechanism for optical near-field enhancement, the intensity of the TH can be increased by more than six orders of magnitude. This article is part of the themed issue ‘New horizons for nanophotonics’.

Light depolarization induced by metallic tips in apertureless near-field optical microscopy and tip-enhanced Raman spectroscopy

2008 ◽  
Vol 19 (21) ◽  
pp. 215702 ◽  
Author(s):  
P G Gucciardi ◽  
M Lopes ◽  
R Déturche ◽  
C Julien ◽  
D Barchiesi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Optical Microscopy ◽  
Near Field ◽  
Tip Enhanced Raman Spectroscopy ◽  
Light Depolarization

Near-field chemical mapping of gold nanostructures using a functionalized scanning probe

2017 ◽  
Vol 19 (46) ◽  
pp. 31063-31071 ◽  
Author(s):  
C. Dab ◽  
C. Awada ◽  
A. Merlen ◽  
A. Ruediger
Keyword(s):  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
High Resolution ◽  
Surface Plasmon ◽  
Photophysical Properties ◽  
Near Field ◽  
Scanning Probe ◽  
Gold Nanostructures ◽  
Chemical Mapping ◽  
Tip Enhanced Raman Spectroscopy

We report on photochemical and photophysical properties produced by Surface Plasmon Resonance (SPR) on metallic nanograins by means of high resolution Functionalized Tip-Enhanced Raman Spectroscopy (F-TERS).

scholarly journals Fabrication of Au and Ag – Coated AFM Probes for Tip-Enhanced Raman Spectroscopy

2021 ◽  
Vol 2015 (1) ◽  
pp. 012013
Author(s):  
L S Basalaeva ◽  
N N Kurus ◽  
E E Rodyakina ◽  
K V Anikin ◽  
A G Milekhin
Keyword(s):  
Raman Spectroscopy ◽  
Electromagnetic Field ◽  
Localized Surface Plasmon Resonance ◽  
Metal Cluster ◽  
Field Enhancement ◽  
Optical Characterization ◽  
Localized Surface Plasmon ◽  
Tip Enhanced Raman Spectroscopy ◽  
Shape And Size

Abstract In this work, approaches for fabrication metal coated probes for Tip Enhanced Raman Spectroscopy (TERS) are considered. It was proposed to use optical characterization of probes to achieve the effective TERS of semiconductor nanoobjects. The shape and size of the metal cluster at the tip apex determines the position of the localized surface plasmon resonance, the electromagnetic field enhancement and, thus, TERS performance. The possibility of optimizing the characteristics of the probes for TERS studies of nanoobjects has been investigated.

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