Optical trapping with focused surface waves
WebJan 1, 2024 · Focused Bloch surface waves can be excited efficiently using an annular beam with azimuthal polarization and a high-numerical-aperture objective. Numerical simulations were performed to calculate the optical forces loaded on a gold particle by focused Bloch surface waves and the results were consistent with those of the experimental observations. WebAug 17, 2024 · Acoustic and optical waves can be used to exert non-contact forces on microscopic and mesoscopic objects. ... The benefits of the focused single-beam trap are its ease of assembly and usability ...
Optical trapping with focused surface waves
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WebTo model an optical trap, we must not only consider a single incident ray but all the rays constituting a highly-focused laser beam, that is a set of many rays that converge at a … WebApr 11, 2005 · We propose a ray optics model to calculate the trapping force on a dielectric particle located on the interface between two media and illuminated by a focused evanescent field beam. Such a focused evanescent beam is produced by a high numerical aperture objective with a central obstruction whose size satisfies the total internal …
WebFeb 24, 2024 · Near-field optical trapping can be realized with focused evanescent waves that are excited at the water-glass interface due to the total internal reflection, or with … WebFeb 24, 2024 · Near-field optical trapping can be realized with focused evanescent waves that are excited at the water–glass interface due to the total internal reflection, or with …
WebMar 1, 2024 · where \(I_{0}\) is the intensity of the trapping laser, r is the radius of the object, \(\lambda \) is the wavelength of the incident light, N is the ratio of the refractive index of the object to that of the surrounding medium, n is the refractive index of the object, \(\mathbf {E}\) is the electric field.. As can be discerned from Eq. 7.4, the only way to increase the … WebDec 19, 2024 · Here we demonstrate that metallic particles can be trapped stably using focused Bloch surface waves that propagate in the near-field region of a dielectric …
WebDec 2, 2024 · Geometrical optics approximation is a classic method for calculating the optical trapping force on particles whose sizes are larger than the wavelength of the trapping light. In this study, the effect of the lens misalignment on optical force was analyzed in the geometrical optics regime. We used geometrical optics to analyze the …
WebAshkin blazed the trail in exhibiting the successful laser trapping of micrometer-sized dielectric particles through the deployment of two counter-propagating beams [].This approach proposes that a strongly focused laser beam can create a stable 3D trap, referred to as optical tweezers [], which have revolutionized the field of optical trapping.. Optical … church\\u0027s leather slippersWebNear-field optical trapping can be realized with focused evanescent waves that are excited at the water-glass interface due to the total internal reflection, or with focused plasmonic waves excited on the water-gold interface. Herein, the performance of these two kinds of … church\u0027s liability concerning seizuresWebJan 1, 2024 · It was previously reported that focused surface plasmon polaritons (SPPs) excited on a thin gold film using a combination of a high-numerical-aperture (NA) … church\\u0027s legs and thighsWebTwo kinds of surface waves are excited and focused to trap dielectric microbeads in liquid. The focused evanescent waves trap a single bead near the focused center, whereas the … dfar countryWebMay 13, 2024 · The technique of optical trapping and manipulation of small neutral particles by lasers is based on the forces of radiation pressure. These are forces arising from the … church\u0027s locationsWebNov 1, 1989 · Show abstract. Simultaneously assembling the functions of lenses and phase vortices into geometric metasurfaces on an ultra-compact platform can potentially be used for light trapping and edge imaging, helping to enhance their applications in polarized optical systems. Here, we propose and theoretically investigate an all-graphene geometric ... church\\u0027s loafers mensWebMar 17, 2024 · By recording these optical spectral data, trapping event kinetics can be visualized, and this indirect approach has been widely used in combination with SIBA … church\u0027s loafers womens