Optoplasmonic probe to realize scanning near-field Raman microscopy

Optics Express
Yu LiuJinglei Du

Abstract

Tip-enhanced Raman spectroscopy (TERS) is a powerful scanning probe technique for Raman detections in nanotechnology to date. However, limited by the physical principles of a nanosize tapered metal (or metal-coated) probe used in a TERS device, only far-field without near-field Raman signal can be collected by the TERS with the metal probe. This makes conventional TERS lower in efficiency and cannot be a real near-field Raman microscopy. In this paper, we propose a simple and realizable optoplasmonic probe model, which is composed of a dielectric microsphere and a metal nanobowtie, to realize an ideal scanning near-field Raman microscopy (SNRM). Using finite-difference time-domain (FDTD) method, calculation results of electric field distributions of the proposed probe demonstrate that the probe provides three outstanding characteristics, including strong enhancement of local electric field, nanoscale distributions of the produced electric filed, and collection enhancement of emitted energy with wide wavelength range in near field. These characteristics of the probe resolve the detecting restrictions of metal probes and provide a real near-field scanning method. Therefore, a potentially novel SNRM can be expected to extend Raman...Continue Reading

References

Mar 31, 2006·The Journal of Physical Chemistry. B·Andrew DownesAlistair Elfick
Jun 12, 2008·Optics Express·Patrick FerrandHervé Rigneault
Jun 12, 2008·Optics Express·Holger Fischer, Olivier J F Martin
Sep 25, 2008·Angewandte Chemie·Achim Hartschuh
Feb 12, 2009·ACS Nano·Elizabeth J SmytheFederico Capasso
Jan 26, 2011·Nano Letters·Alexander Weber-BargioniP James Schuck
Feb 9, 2011·Proceedings of the National Academy of Sciences of the United States of America·Svetlana V Boriskina, Björn M Reinhard
Nov 24, 2011·Optics Express·Svetlana V Boriskina, Björn M Reinhard
Jan 24, 2012·Annual Review of Physical Chemistry·Bruno PettingerNicola Scott
Oct 27, 2012·Nano Letters·Mathieu MivelleMaria F Garcia-Parajo
Aug 27, 2014·Scientific Reports·Manas Ranjan GartiaJ Gary Eden
Sep 1, 2015·Analytical and Bioanalytical Chemistry·Teng-Xiang HuangBin Ren
Feb 12, 2014·Advanced Functional Materials·Yan HongBjörn M Reinhard

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cell Imaging in CNS

Here is the latest research on cell imaging and imaging modalities, including light-sheet microscopy, in the central nervous system.