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We show that light can manipulate the mechanical properties of fluids and affect flow even in dense suspensions. The underlying mechanism involves the forces exerted by the light on nanoparticles suspended in the liquid. We discuss these ideas, present experiments, and suggest applications.
We introduce loss-proof shape-invariant nonparaxial accelerating beams that overcome both diffraction and absorption, and demonstrate their use in acceleration of microparticles inside liquids along curved trajectories that are significantly steeper than ever achieved.
Accelerating beams completely rely on interference: coherent superposition of waves. In spite of that fundamental feature, we demonstrate, experimentally and theoretically, partially-spatially-incoherent nonparaxial accelerating beams.
We introduce a new class of 1 & 2-dimensional beams that overcome both diffraction & absorption, enabling accelerating plasmons that maintain their intensity profile. In free space these beams exhibit a counterintuitive exponential intensity growth.
We present, theoretically and experimentally, non-broadening optical beams having arbitrarily small superoscillatory features. Our design facilitates control over the symmetry, width, and rotational orientation of the superoscillating beams.
We demonstrate theoretically and experimentally gradient-force induced, nanoparticle shockwaves forming in dense strongly scattering colloidal-suspensions. These light-induced directional ‘spear-shaped’ wavefronts allow concentrating and transporting large amounts of nanoparticles in local regions of a microfluidic channel.
Wave-packets of light propagating along curved trajectories in space are rapidly gaining importance since their introduction in 2007 [1–2]. Interestingly, all such “non-diffracting self-accelerating” beams studied thus far followed a parabolic trajectory as they propagated in free space [1–5]. Here we generate continuous sets of accelerating optical beams propagating along arbitrary 1D curves in space,...
We demonstrate theoretically and experimentally non-broadening optical beams that propagate along any arbitrarily-chosen convex trajectory in space. We present a general method to construct these beams and explore their universal properties using catastrophe theory.
We unite chaotic Optofluidics and chaotic Electronics in a single class of topologically-equivalent dynamic systems. This is made possible with a new comparative approach for dynamic systems research, based on the memories of the systems.
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