Direct measurement of nanoparticle interactions using near-field photonics (Conference Presentation)

2016 ◽  
Author(s):  
Perry Schein ◽  
Dakota O'Dell ◽  
David Erickson
Keyword(s):  
Direct Measurement ◽  
Near Field ◽  
Nanoparticle Interactions

scholarly journals Single-shot imaging of surface molecular ionization in nanosystems

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Fenghao Sun ◽  
Hui Li ◽  
Shanshan Song ◽  
Fei Chen ◽  
Jiawei Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Strong Field ◽  
Imaging Technique ◽  
Near Field ◽  
Velocity Map Imaging ◽  
Single Shot ◽  
Surface Molecules ◽  
Nanoparticle Interactions ◽  
Field Response ◽  
Ion Species

Abstract Using single-shot velocity map imaging technique, explosion imaging of different ion species ejected from 50 nm SiO2 nanoparticles are obtained excitedly by strong near-infrared and ultraviolet femtosecond laser fields. Characteristic momentum distributions showing forward emission of the ions at low excitation intensities and shock wave behaviors at high intensities are observed. When the excitation intensity is close to the dissociative ionization threshold of the surface molecules, the resulting ion products can be used to image the instant near-field distributions. The underlying dynamics of shock formation are simulated by using a Coulomb explosion model. Our results allow one to distinguish the ultrafast strong-field response of various molecular species in nanosystems and will open a new way for further exploration of the underlying dynamics of laser-and-nanoparticle interactions.

Direct measurement of the absolute value of the interaction force between the fiber probe and the sample in a scanning near-field optical microscope

2002 ◽  
Vol 81 (8) ◽  
pp. 1503-1505 ◽  
Author(s):  
D. A. Lapshin ◽  
V. S. Letokhov ◽  
G. T. Shubeita ◽  
S. K. Sekatskii ◽  
G. Dietler
Keyword(s):  
Direct Measurement ◽  
Near Field ◽  
Interaction Force ◽  
Optical Microscope ◽  
Fiber Probe ◽  
Absolute Value ◽  
The Absolute

Effect of Substrate and Nanoparticle Spacing on Plasmonic Enhancement in Three-Dimensional Nanoparticle Structures

2017 ◽  
Vol 5 (4) ◽  
Author(s):  
Anil Yuksel ◽  
Edward T. Yu ◽  
Jayathi Murthy ◽  
Michael Cullinan
Keyword(s):  
Near Field ◽  
Three Dimensional ◽  
Polarized Light ◽  
Field Enhancement ◽  
Transverse Magnetic ◽  
Plasmonic Enhancement ◽  
Nanoparticle Assemblies ◽  
Nanoparticle Interactions ◽  
Gap Spacing ◽  
532 Nm

Surface plasmon polaritons associated with light-nanoparticle interactions can result in dramatic enhancement of electromagnetic fields near and in the gaps between the particles, which can have a large effect on the sintering of these nanoparticles. For example, the plasmonic field enhancement within nanoparticle assemblies is affected by the particle size, spacing, interlayer distance, and light source properties. Computational analysis of plasmonic effects in three-dimensional (3D) nanoparticle packings are presented herein using 532 nm plane wave light. This analysis provides insight into the particle interactions both within and between adjacent layers for multilayer nanoparticle packings. Electric field enhancements up to 400-fold for transverse magnetic (TM) or X-polarized light and 26-fold for transverse electric (TE) or Y-polarized light are observed. It is observed that the thermo-optical properties of the nanoparticle packings change nonlinearly between 0 and 10 nm gap spacing due to the strong and nonlocal near-field interaction between the particles for TM polarized light, but this relationship is linear for TE polarized light. These studies help provide a foundation for understanding micro/nanoscale heating and heat transport for Cu nanoparticle packings under 532 nm light under different polarization for the photonic sintering of nanoparticle assemblies.

Direct measurement of optical phase in the near field

2000 ◽  
Vol 76 (5) ◽  
pp. 541-543 ◽  
Author(s):  
P. L. Phillips ◽  
J. C. Knight ◽  
J. M. Pottage ◽  
G. Kakarantzas ◽  
P. St. J. Russell
Keyword(s):  
Direct Measurement ◽  
Near Field ◽  
Optical Phase

scholarly journals Direct measurement of the near-field super resolved focused spot in InSb

2012 ◽  
Vol 20 (9) ◽  
pp. 10426 ◽  
Author(s):  
A.C. Assafrao ◽  
A.J.H. Wachters ◽  
M. Verheijen ◽  
A.M. Nugrowati ◽  
S.F. Pereira ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Near Field

Application of fibre-optic rotational seismometer in investigation of seismic rotational waves

2008 ◽  
Vol 16 (3) ◽  
Author(s):  
L. Jaroszewicz ◽  
Z. Krajewski
Keyword(s):  
Experimental Data ◽  
Direct Measurement ◽  
Seismic Waves ◽  
Near Field ◽  
Seismic Events ◽  
Fibre Optic ◽  
Simultaneous Application ◽  
New Device ◽  
Rotational Waves ◽  
Rotation Component

AbstractApplication of a fibre-optic Sagnac interferometer as a rotational seismometer is presented in this paper. It is a new device which parameters (sensitivity equal to 4.3×10−8 rad/s for 2σ) are comparable with the parameters of typical mechanical rotational seismometers. However, a direct measurement of rotation without influence of linear motions for fibre-optic rotational seismometer designed it for a direct measurement of a ground rotation component. Experimental data obtained during simultaneous application of the above two types of sensors are also presented. Research of near-field seismic events, the amplitude of which has been identified in the range of 1.5×10−6 rad/s to 2×10−7 rad/s, shows directly that, so-called, seismic rotational waves exist independently of typical seismic waves generated during earthquakes.

Sign in / Sign up

Export Citation Format

Share Document