6558 Search results for: „“
Realization of curved Bessel beams: propagation around obstructions
We present an experimental realization of spiraling and snaking zero-order Bessel beams; light modes designed to deviate from straight-line propagation. We show that these modes can be generated with a...
PublicationsOptical aberration compensation in a multiplexed optical trapping system
In this paper we discuss optical aberrations within a multiplexed optical trapping system. We analyze two of the most powerful methods for optical trap multiplexing: time-shared beam steering and holographic...
PublicationsMultiple optical trapping and binding: new routes to self-assembly
The impact of optical forces in the physical and biological sciences now enables the manipulation of objects ranging in size from a cell down to a single atom. The mechanical effects of optical fields...
PublicationsThe holographic optical micro-manipulation system based on counter-propagating beams
We present a system employing a dynamic diffractive optical element to control properties of two counter-propagating beams overlapping within a sample chamber. This system allows us to eliminate optical...
PublicationsBidirectional Optical Sorting of Gold Nanoparticles
We present a generic technique allowing size-based all-optical sorting of gold nanoparticles. Optical forces acting on metallic nanoparticles are substantially enhanced when they are illuminated at a wavelength...
PublicationsExploiting multimode waveguides for pure fibre-based imaging
There has been an immense drive in modern microscopy towards miniaturization and fibre-based technology. This has been necessitated by the need to access hostile or difficult environments in situ and in...
PublicationsLight-sheet microscopy using an Airy beam
Light-sheet microscopy facilitates rapid, high-contrast, volumetric imaging with minimal sample exposure. However, the rapid divergence of a traditional Gaussian Light sheet restricts the field of view...
PublicationsIn situ wavefront correction and its application to micromanipulation
In any optical system, distortions to a propagating wavefront reduce the spatial coherence of a light field, making it increasingly difficult to obtain the theoretical diffraction-limited spot size. Such...
PublicationsShaping the future of manipulation
Optical forces can be used to manipulate biological and colloidal material in a non-contact manner. This forms the foundation of a wealth of exciting science, particularly in the fields of physics, biology...
PublicationsExperimental demonstration of optical transport, sorting and self-arrangement using a ‘tractor beam’
Following the Keplerian idea of optical forces, one would intuitively expect that an object illuminated by sunlight radiation or a laser beam will be accelerated along the direction of photon flow. Recent...
Publications