Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy

2013 ◽  
Vol 15 (12) ◽  
pp. 4265-4269 ◽  
Author(s):  
Toru Shimada ◽  
Kohei Imura ◽  
Hiromi Okamoto ◽  
Masahiro Kitajima
Keyword(s):  
Gold Nanoparticles ◽  
Spatial Distribution ◽  
Optical Microscopy ◽  
Near Field ◽  
Optical Fields ◽  
Linear Arrays ◽  
One Dimensional

Optical waveguide behavior of Se-doped and undoped CdS one-dimensional nanostructures using near-field optical microscopy

2009 ◽  
Vol 52 (1) ◽  
pp. 26-30
Author(s):  
Xiao Wang ◽  
Dan Liu ◽  
Anlian Pan ◽  
Zheyu Fang ◽  
Shan Huang ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Optical Waveguide ◽  
Near Field ◽  
One Dimensional ◽  
One Dimensional Nanostructures

Near-Field Scanning Optical Microscopy: Single Channel Imaging of Selected Gold Nanoparticles through Two Photon Induced Photoluminescence

2014 ◽  
Vol 938 ◽  
pp. 118-122 ◽  
Author(s):  
Mohammad Kamal Hossain ◽  
Masahiro Kitajima ◽  
Kohei Imura ◽  
Hiromi Okamoto
Keyword(s):  
Gold Nanoparticles ◽  
Optical Microscopy ◽  
Near Field ◽  
Fdtd Simulation ◽  
Local Geometry ◽  
Optical Confinement ◽  
Two Photon ◽  
Em Field ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

Near-field scanning optical microscopy (NSOM) is known to be a technique of choice to investigate nanometric materials and their properties beyond far-field diffraction limit resulting high spatial, spectral and temporal resolution. Here in this report, a state of art facility, aperture-NSOM was used to probe single nanoparticle, dimer, trimer and small nanoaggregate of gold nanoparticles. Shear force topography and two photon induced photoluminescence (TPI-PL) images captured simultaneously by the system facilitated to clarify the correlation between the local geometry and the emitted photon of TPI-PL. Small gold aggregates including trimer showed strong optical confinement of TPI-PL with reference to that of single gold nanoparticles. It was also evident that the interparticle gap does have a great influence in localized electromagnetic (EM) field mediated optical confinement of TPI-PL. Such observations were also supported by finite different time domain (FDTD) analysis keeping the simulation parameter nearly identical to that of experiment. FDTD simulation demonstrated that incident excitation parallel to the interparticle axis induces strong near-field distribution at the interstitials whereas out of plane excitation modifies such confinement depending on the nanometric geometry of the nanoaggregates. Such an observation is indispensable to understand the localized EM field-mediated optical confinement in surface-enhanced spectroscopy.

Investigation of spatial distribution of photocurrent in the plane of a Si p–n photodiode with GeSi nanoislands by scanning near-field optical microscopy

2017 ◽  
Vol 51 (4) ◽  
pp. 536-541 ◽  
Author(s):  
D. O. Filatov ◽  
I. A. Kazantseva ◽  
V. G. Shengurov ◽  
V. Yu. Chalkov ◽  
S. A. Denisov ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Optical Microscopy ◽  
Near Field
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