Results 11 to 20 of about 1,035,293 (328)

Direct measurement of the nonconservative force field generated by optical tweezers [PDF]

open access: yes, 2009
The force field of optical tweezers is commonly assumed to be conservative, neglecting the complex action of the scattering force. Using a novel method that extracts local forces from trajectories of an optically trapped particle, we measure the three ...
Florin, Ernst-Ludwig   +4 more
core   +3 more sources

Chapter 6 Optical Force Microscopy

open access: hybrid, 1997
Publisher Summary This chapter discusses the optical force microscopy. One goal of cell biology research is to observe individual cell components in their native environment. Nondamaging, high-resolution techniques for imaging molecular structures in aqueous buffer continue to be developed and improved.
Watt W. Webb, Andrea L. Stout
openaire   +4 more sources

Strong optical force induced by morphology dependent resonances [PDF]

open access: yesOpt. Lett. 30, 1956 (2005), 2005
We consider the resonant optical force acting on a pair of transparent microspheres by the excitation of the Morphology Dependent Resonance (MDR). The bonding and anti-bonding modes of the MDR correspond to strong attractions and repulsions respectively.
Antonoyiannakis   +13 more
core   +4 more sources

On optical forces in spherical whispering gallery mode resonators [PDF]

open access: yes, 2011
In this paper we discuss the force exerted by the field of an optical cavity on a polarizable dipole. We show that the modification of the cavity modes due to interaction with the dipole significantly alters the properties of the force.
Anetsberger   +27 more
core   +2 more sources

Optical Force of Bessel Pincer Light-Sheets Beam on a Dielectric Sphere of Arbitrary Size. [PDF]

open access: yesNanomaterials (Basel), 2022
In the framework of Generalized Lorenz–Mie theory (GLMT), based on the expansion results of electromagnetic field radiation components of Bessel pincer light sheets beam acting on dielectric particles of arbitrary size, the expression of radiation force ...
Zhang S   +5 more
europepmc   +2 more sources

Multi force optical tweezers to generate gradients of forces

open access: goldOptics Express, 2004
We present a multi trap optical tweezes system that enables to generate two-dimensional dynamical configurations of focal spot where the trapping force of each element of the pattern can be individually changed. Force gradients in the pN range can be generated on a micrometer scale.
Maïté Coppey-Moisan   +4 more
openaire   +4 more sources

Back-propagation-assisted inverse design of structured light fields for given profiles of optical force. [PDF]

open access: yesNanophotonics, 2023
Designing a monochromatic spatially-structured light field that recovers the pre-specified profile of optical force (OF) exerted on a particle is an inverse problem.
Zhao X, Lin H, Chen H, Zheng H, Ng J.
europepmc   +2 more sources

Optical Force on a Metal Nanorod Exerted by a Photonic Jet. [PDF]

open access: yesNanomaterials (Basel), 2022
In this article, we study the optical force exerted on nanorods. In recent years, the capture of micro-nanoparticles has been a frontier topic in optics. A Photonic Jet (PJ) is an emerging subwavelength beam with excellent application prospects.
Wei B   +5 more
europepmc   +2 more sources

Optical Force Effects of Rayleigh Particles by Cylindrical Vector Beams. [PDF]

open access: yesNanomaterials (Basel)
High-order cylindrical vector beams possess flexible spatial polarization and exhibit new effects and phenomena that can expand the functionality and enhance the capability of optical systems.
Zhao Y, Zhou L, Jiang X, Zhu L, Shi Q.
europepmc   +2 more sources

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