12 Result(s)
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Article
Open AccessA decomposition of light’s spin angular momentum density
Light carries intrinsic spin angular momentum (SAM) when the electric or magnetic field vector rotates over time. A familiar vector equation calculates the direction of light’s SAM density using the right-hand...
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Article
Open AccessCreating tunable lateral optical forces through multipolar interplay in single nanowires
The concept of lateral optical force (LOF) is of general interest in optical manipulation as it releases the constraint of intensity gradient in tightly focused light, yet such a force is normally limited to e...
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An optical double-slit experiment in time
Time-varying photonics constitutes an emerging concept where a material’s time-dependence is used to achieve novel functionalities. A temporal double-slit-diffraction experiment demonstrates the feasibility of...
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Open AccessStructured transverse orbital angular momentum probed by a levitated optomechanical sensor
The momentum carried by structured light fields exhibits a rich array of surprising features. In this work, we generate transverse orbital angular momentum (TOAM) in the interference field of two parallel and cou...
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Open AccessCreating and moving nanoantenna cold spots anywhere
Cold spots are sub-wavelength regions which might emerge near a nanoantenna, should one or more components of some far-field illumination cancel out with scattered light. We show that by changing only the pola...
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Open AccessDesigner photonic dynamics by using non-uniform electron temperature distribution for on-demand all-optical switching times
While free electrons in metals respond to ultrafast excitation with refractive index changes on femtosecond time scales, typical relaxation mechanisms occur over several picoseconds, governed by electron-phono...
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Open AccessExperimental demonstration of linear and spinning Janus dipoles for polarisation- and wavelength-selective near-field coupling
The electromagnetic field scattered by nano-objects contains a broad range of wavevectors and can be efficiently coupled to waveguided modes. The dominant contribution to scattering from subwavelength dielectr...
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Ultrafast synthesis and switching of light polarization in nonlinear anisotropic metamaterials
Optical communications, laser science, microscopy and metrology demand control of light polarization, which is also used as a probe of chemical and biological systems. Typically, certain polarization states of...
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Open AccessRepulsion of polarised particles from anisotropic materials with a near-zero permittivity component
Reduction of adhesion and stiction is crucial for robust operation on nanomechanical and optofluidic devices as well as atom and molecule behaviour near surfaces. It can be achieved using electric charging, ma...
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Open AccessErratum: Lateral forces on circularly polarizable particles near a surface
Nature Communications 6: Article number: 8799 (2015); Published 19 November 2015; Updated 14 December 2015 Due to errors in the production process data were missing in the original version of Fig. 4b. The corr...
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Open AccessLateral forces on circularly polarizable particles near a surface
Optical forces allow manipulation of small particles and control of nanophotonic structures with light beams. While some techniques rely on structured light to move particles using field intensity gradients, a...
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Article
Photonic spin Hall effect in hyperbolic metamaterials for polarization-controlled routing of subwavelength modes
The routing of light in a deep subwavelength regime enables a variety of important applications in photonics, quantum information technologies, imaging and biosensing. Here we describe and experimentally demon...
