Optical trapping with focused surface waves
WebNov 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 ... WebFeb 24, 2024 · When power increased from 20 mW to 60 mW, optical trapping force raised from 4.9 ± 0.4 pN to14.2 ± 1.1 pN, and optothermal trapping force raised from 5.8 ± 0.7 …
Optical trapping with focused surface waves
Did you know?
WebNational Center for Biotechnology Information WebAug 1, 2024 · These imprinted surfaces, dubbed metasurfaces, focus laser light to trap, manipulate and image individual atoms within a vapor. The metasurfaces can operate in …
WebApr 12, 2024 · The experiments are further extended to wave interference photonic crystals and random pyramids, paving a way to estimate the photogeneration rate of diverse surface light-trapping topologies by collecting nearly all photocarriers. The insights reported here provide a systematic experimental basis to investigate interfacial effects on ... 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 …
WebMar 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 …
WebFigure 1:Ray model for the trapping force at the focus of a laser beam. A particle displaced horizontally (A) or vertically (B) from the focus (at x = y = z = 0) refracts the light away …
WebJun 1, 1998 · Abstract. We suggest a modification of a single beam optical trap which enables more effective axial trapping of nanoparticles. We employed interference of an incident wave and the wave which is reflected by the bottom of the trapping cell to create a standing wave trap. The scattering force is strongly suppressed for a highly reflective ... sunrise sunset times carson city nvWebMar 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 … sunrise sunset times gothenburg neWebOptical Trapping, also known as Optical Tweezers (OT), is a technique that uses light scattering to hold an object in place. OT is based on a concept outlined by Arthur Ashkin … sunrise sunset times edinburgh decemberWebJan 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. sunrise sunset times atlantic city njWebThe forces and torques exerted by an optical trap can be computed by first calculating the electromagnetic field surrounding an illuminated object and then integrating the Maxwell stress tensor over its surface. ... This image can be decomposed into a set of plane waves, each of which is brought to a focus by the objective lens. sunrise sunset times georgetown kyWebJan 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) … sunrise sunset times gothenburgWebFeb 17, 2024 · (a) Experimental setup of a standing-wave Raman tweezers (SWRT). The trapping laser is focused through an objective lens and reflected by a planar dichroic mirror to form a standing-wave optical ... sunrise sunset times in anchorage ak