scholarly journals Optical Manipulation with Plasmonic Beam Shaping Antenna Structures

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Young Chul Jun ◽  
Igal Brener
Keyword(s):  
Optical Trapping ◽  
Near Field ◽  
Beam Shaping ◽  
Optical Force ◽  
Metal Nanostructures ◽  
Optical Manipulation ◽  
Far Field ◽  
Optical Forces ◽  
Optical Components

Near-field optical trapping of objects using plasmonic antenna structures has recently attracted great attention. However, metal nanostructures also provide a compact platform for general wavefront engineering of intermediate and far-field beams. Here, we analyze optical forces generated by plasmonic beam shaping antenna structures and show that they can be used for general optical manipulation such as guiding of a dielectric particle along a linear or curved trajectory. This removes the need for bulky diffractive optical components and facilitates the integration of optical force manipulation into a highly functional, compact system.

scholarly journals Far-field midinfrared superresolution imaging and spectroscopy of single high aspect ratio gold nanowires

2020 ◽  
Vol 117 (5) ◽  
pp. 2288-2293 ◽  
Author(s):  
Kyle Aleshire ◽  
Ilia M. Pavlovetc ◽  
Robyn Collette ◽  
Xiang-Tian Kong ◽  
Philip D. Rack ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Optical Measurement ◽  
Near Field ◽  
Metal Nanostructures ◽  
Gold Nanowires ◽  
Far Field ◽  
Ambient Conditions ◽  
Fabry Perot ◽  
Imaging And Spectroscopy

Limited approaches exist for imaging and recording spectra of individual nanostructures in the midinfrared region. Here we use infrared photothermal heterodyne imaging (IR-PHI) to interrogate single, high aspect ratio Au nanowires (NWs). Spectra recorded between 2,800 and 4,000 cm−1 for 2.5–3.9-μm-long NWs reveal a series of resonances due to the Fabry–Pérot modes of the NWs. Crucially, IR-PHI images show structure that reflects the spatial distribution of the NW absorption, and allow the resonances to be assigned to the m = 3 and m = 4 Fabry–Pérot modes. This far-field optical measurement has been used to image the mode structure of plasmon resonances in metal nanostructures, and is made possible by the superresolution capabilities of IR-PHI. The linewidths in the NW spectra range from 35 to 75 meV and, in several cases, are significantly below the limiting values predicted by the bulk Au Drude damping parameter. These linewidths imply long dephasing times, and are attributed to reduction in both radiation damping and resistive heating effects in the NWs. Compared to previous imaging studies of NW Fabry–Pérot modes using electron microscopy or near-field optical scanning techniques, IR-PHI experiments are performed under ambient conditions, enabling detailed studies of how the environment affects mid-IR plasmons.

scholarly journals Optical trapping and optical force positioning of two-dimensional materials

Nanoscale ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 1245-1255 ◽  
Author(s):  
M. G. Donato ◽  
E. Messina ◽  
A. Foti ◽  
T. J. Smart ◽  
P. H. Jones ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Optical Trapping ◽  
Layered Materials ◽  
Optical Force ◽  
Two Dimensional ◽  
Optical Forces ◽  
Two Dimensional Materials ◽  
Liquid Phase Exfoliation

Optical forces are used for trapping, characterization, and positioning of layered materials (hBN, MoS2, and WS2) obtained by liquid phase exfoliation.

Nanowire-type plasmonic waveguides as strong and tunable optical tweezers

2019 ◽  
Vol 33 (07) ◽  
pp. 1950081 ◽  
Author(s):  
Shu Yang ◽  
Kang Zhao
Keyword(s):  
Long Range ◽  
Optical Tweezers ◽  
Optical Trapping ◽  
Near Field ◽  
Optical Forces ◽  
Plasmonic Waveguides ◽  
Trapping Forces

A series of nanowire-type plasmonic waveguides are proposed. The mode properties of these waveguides and their dependences on various geometry parameters are studied. It is shown that they can generate deep subwavelength confinement and long-range propagation simultaneously. Moreover, the optical forces exerted on dielectric nanoparticles by these waveguides are calculated. It is found that the optical trapping forces are very strong, and that their distribution can be effectively regulated by certain geometry parameters. Using these features, strong and tunable near-field optical tweezers can be designed.

scholarly journals Simulation of Optical Nano-Manipulation with Metallic Single and Dual Probe Irradiated by Polarized Near-Field Laser

2022 ◽  
Vol 12 (2) ◽  
pp. 815
Author(s):  
Genwang Wang ◽  
Ye Ding ◽  
Haotian Long ◽  
Yanchao Guan ◽  
Xiwen Lu ◽  
...  
Keyword(s):  
Near Field ◽  
Field Trapping ◽  
Optical Microscope ◽  
Optical Force ◽  
Optical Manipulation ◽  
Effective Wavelength ◽  
Single Probe ◽  
Trapping Force ◽  
Simulation Results ◽  
Dual Probe

Nano-manipulation technology, as a kind of “bottom-up” tool, has exhibited an excellent capacity in the field of measurement and fabrication on the nanoscale. Although variety manipulation methods based on probes and microscopes were proposed and widely used due to locating and imaging with high resolution, the development of non-contacted schemes for these methods is still indispensable to operate small objects without damage. However, optical manipulation, especially near-field trapping, is a perfect candidate for establishing brilliant manipulation systems. This paper reports about simulations on the electric and force fields at the tips of metallic probes irradiated by polarized laser outputted coming from a scanning near-field optical microscope probe. Distributions of electric and force field at the tip of a probe have proven that the polarized laser can induce nanoscale evanescent fields with high intensity, which arouse effective force to move nanoparticles. Moreover, schemes with dual probes are also presented and discussed in this paper. Simulation results indicate that different combinations of metallic probes and polarized lasers will provide diverse near-field and corresponding optical force. With the suitable direction of probes and polarization direction, the dual probe exhibits higher trapping force and wider effective wavelength range than a single probe. So, these results give more novel and promising selections for realizing optical manipulation in experiments, so that distinguished multi-functional manipulation systems can be developed.

Optical Trapping, Sensing, and Imaging by Photonic Nanojets

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 434
Author(s):  
Heng Li ◽  
Wanying Song ◽  
Yanan Zhao ◽  
Qin Cao ◽  
Ahao Wen
Keyword(s):  
Optical Tweezers ◽  
Optical Trapping ◽  
Near Field ◽  
Super Resolution ◽  
Diffraction Limit ◽  
Research Progress ◽  
Optical Forces ◽  
Resolution Imaging ◽  
Photonic Nanojets ◽  
Near Field Scanning

The optical trapping, sensing, and imaging of nanostructures and biological samples are research hotspots in the fields of biomedicine and nanophotonics. However, because of the diffraction limit of light, traditional optical tweezers and microscopy are difficult to use to trap and observe objects smaller than 200 nm. Near-field scanning probes, metamaterial superlenses, and photonic crystals have been designed to overcome the diffraction limit, and thus are used for nanoscale optical trapping, sensing, and imaging. Additionally, photonic nanojets that are simply generated by dielectric microspheres can break the diffraction limit and enhance optical forces, detection signals, and imaging resolution. In this review, we summarize the current types of microsphere lenses, as well as their principles and applications in nano-optical trapping, signal enhancement, and super-resolution imaging, with particular attention paid to research progress in photonic nanojets for the trapping, sensing, and imaging of biological cells and tissues.

scholarly journals Numerical and Experimental Investigation on the Optical Manipulation from an Axicon Lensed Fiber

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 187
Author(s):  
Wu Zhang ◽  
Yanxiao Lin ◽  
Yusong Gao ◽  
Zekai Guo ◽  
Xiangling Li ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Fluid Flow ◽  
Optical Trapping ◽  
Incident Light ◽  
Microfluidic Channel ◽  
Flow Speed ◽  
Optical Force ◽  
Optical Manipulation ◽  
Incident Wavelength ◽  
Polystyrene Microsphere

Here we numerically and experimentally studied the optical trapping on a microsphere from an axicon lensed fiber (ALF). The optical force from the fiber with different tapered lengths and by incident light at different wavelengths is calculated. Numerically, the microsphere can be trapped by the fiber with tapered outline y=±x/0.5 and y=±x at a short incident wavelength of 900 nm. While for the fiber with tapered outline y=±x/2, the microsphere can be trapped by the light with longer wavelength of 1100 nm, 1300 nm, or 1500 nm. The optical trapping to a polystyrene microsphere is experimentally demonstrated in a microfluidic channel and the corresponding optical force is derived according to the fluid flow speed. This study can provide a guidance for future tapered fibre design for optical trapping to microspheres.

scholarly journals Singular Warped Beams Controlled by Tangent Phase Modulation

Photonics ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 343
Author(s):  
Gustavo Funes ◽  
Eduardo Peters ◽  
Jaime Anguita
Keyword(s):  
Intensity Distribution ◽  
Phase Modulation ◽  
Optical Trapping ◽  
Linear Functions ◽  
Optical Manipulation ◽  
Far Field ◽  
Propagation Characteristics ◽  
Particle Manipulation ◽  
Spatial Phase ◽  
Topological States

We analyze the effect of spatial phase modulation using non-linear functions applied to singular warped beams to control their topological states and intensity distribution. Such beams are candidates for optical trapping and particle manipulation for their controllable pattern of intensities and singularities. We first simulate several kinds of warped beams to analyze their intensity profiles and propagation characteristics. Secondly, we experimentally validate the simulations and investigate the far-field profiles. By calculating the intensity gradients, we describe how these beams are qualified candidates for optical manipulation and trapping.

Application of Near-Field and Far-Field Beam Shaping Techniques for High-Power Lasers

2020 ◽  
Author(s):  
S.-W. Bahk ◽  
A. Kozlov ◽  
I. A. Begishev ◽  
R. G. Roides ◽  
D. H. Froula ◽  
...  
Keyword(s):  
High Power ◽  
Near Field ◽  
Beam Shaping ◽  
Far Field ◽  
High Power Lasers

scholarly journals Optical forces in coupled plasmonic nanosystems: Near field and far field interaction regimes

2007 ◽  
Vol 15 (15) ◽  
pp. 9631 ◽  
Author(s):  
Élodie Lamothe ◽  
Gaëtan Lévêque ◽  
Olivier J. F. Martin
Keyword(s):  
Near Field ◽  
Far Field ◽  
Optical Forces ◽  
Field Interaction

scholarly journals Efficient generation of complex vectorial optical fields with metasurfaces

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Dongyi Wang ◽  
Feifei Liu ◽  
Tong Liu ◽  
Shulin Sun ◽  
Qiong He ◽  
...  
Keyword(s):  
Near Field ◽  
Model System ◽  
Optical Manipulation ◽  
Jones Matrix ◽  
Far Field ◽  
Experimental Demonstration ◽  
Optical Fields ◽  
Polarization Distribution ◽  
Polarized Surface ◽  
Plasmon Wave

AbstractVectorial optical fields (VOFs) exhibiting arbitrarily designed wavefronts and polarization distributions are highly desired in photonics. However, current methods to generate them either require complicated setups or exhibit limited functionalities, which is unfavorable for integration-optics applications. Here, we propose a generic approach to efficiently generate arbitrary VOFs based on metasurfaces exhibiting full-matrix yet inhomogeneous Jones-matrix distributions. We illustrate our strategy with analytical calculations on a model system and an experimental demonstration of a meta-device that can simultaneously deflect light and manipulate its polarization. Based on these benchmark results, we next experimentally demonstrate the generation of a far-field VOF exhibiting both a vortex wavefront and an inhomogeneous polarization distribution. Finally, we design/fabricate a meta-device and experimentally demonstrate that it can generate a complex near-field VOF—a cylindrically polarized surface plasmon wave possessing orbital angular momentum—with an efficiency of ~34%. Our results establish an efficient and ultracompact platform for generating arbitrary predesigned VOFs in both the near- and far-fields, which may find many applications in optical manipulation and communications.

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