scholarly journals Generalized description of the nonlinear optical force in laser trapping of dielectric nanoparticles

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Anita Devi ◽  
Arijit K. De
Keyword(s):  
Nonlinear Optical ◽  
Optical Force ◽  
Laser Trapping

scholarly journals Nonlinear Optical Tweezers As an Optical Method for Controlling Particles with High Trap Efficiency

2019 ◽  
Vol 29 (3) ◽  
Author(s):  
Ho Quang Quy
Keyword(s):  
Optical Tweezers ◽  
Optical Method ◽  
Nonlinear Optical ◽  
Medical Science ◽  
Optical Force ◽  
Trapping Efficiency ◽  
Optical Efficiency ◽  
Trapping Region ◽  
Common Trend

Optical tweezers have seen as an essential tool for the manipulation dielectric microparticles and nanoparticles due to its non-contact action and high resolution of optical force. Up to now, there has been a lot of optical tweezers applications in the fields of biophysics, chemistry, medical science and nanoscience. Recently, optical tweezers have been theoretically and experimentally developing for the nanomechanical characterization of various kinds of biological cells. The configuration of optical tweezers has been day after day improving to enhance the trapping efficiency, spatial and temporal resolution and easy to control trapped objects. In common trend of optical tweezers improvements, we will discuss in detail of the several configurations of nonlinear optical tweezers using nonlinear materials as the added lens. We will also address the advantages of nonlinear optical tweezers, such as enhance optical efficiency, reduce trapping region, simplify controlling all-optical method. Finally, we present discussions about the specific properties of nonlinear optical tweezers used for stretch DNA molecule as example and an ideal to improve nonlinear  optical tweezers using thin layer of organic dye  proposed for going time.

scholarly journals Passive All-Optical Force Clamp for High-Resolution Laser Trapping

2005 ◽  
Vol 95 (20) ◽  
Author(s):  
William J. Greenleaf ◽  
Michael T. Woodside ◽  
Elio A. Abbondanzieri ◽  
Steven M. Block
Keyword(s):  
High Resolution ◽  
Optical Force ◽  
Laser Trapping ◽  
All Optical ◽  
Force Clamp

A Study of Optical Force for the Laser Trapping of Microbubbles

2000 ◽  
Vol 2000 (0) ◽  
pp. 117
Author(s):  
Akiko UEMURA ◽  
Shinji YAMASAKI ◽  
Hiroyuki TAKAHIRA
Keyword(s):  
Optical Force ◽  
Laser Trapping

Roughness measurements of nonlinear optical polymer films by scanning tunneling microscopy

1989 ◽  
Vol 47 ◽  
pp. 22-23
Author(s):  
I. H. Musselman ◽  
R.-T. Chen ◽  
P. E. Russell
Keyword(s):  
Surface Roughness ◽  
Scanning Tunneling Microscopy ◽  
Nonlinear Optical ◽  
Polymer Surface ◽  
Light Extinction ◽  
Scanning Tunneling ◽  
Silicon Substrates ◽  
Tunneling Microscopy ◽  
Optical Polymer ◽  
Total Light

Scanning tunneling microscopy (STM) has been used to characterize the surface roughness of nonlinear optical (NLO) polymers. A review of STM of polymer surfaces is included in this volume. The NLO polymers are instrumental in the development of electrooptical waveguide devices, the most fundamental of which is the modulator. The most common modulator design is the Mach Zehnder interferometer, in which the input light is split into two legs and then recombined into a common output within the two dimensional waveguide. A π phase retardation, resulting in total light extinction at the output of the interferometer, can be achieved by changing the refractive index of one leg with respect to the other using the electrooptic effect. For best device performance, it is essential that the NLO polymer exhibit minimal surface roughness in order to reduce light scattering. Scanning tunneling microscopy, with its high lateral and vertical resolution, is capable of quantifying the NLO polymer surface roughness induced by processing. Results are presented below in which STM was used to measure the surface roughness of films produced by spin-coating NLO-active polymers onto silicon substrates.

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