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The photonics toolkit includes waveguides, sources, detectors, modulators, etc., but lacks optical memory devices. Natural media with nonlinearities strong enough to show intrinsic bistability do not exist. Here, for the first time we experimentally demonstrate nonlinear nano-opto-mechanical metamaterials exhibiting optical bistability, leading to optical memory operation at sub-milliwatt power levels...
We provide the first demonstration of a high-bandwidth, low-intensity fiberized all-optical gate exploiting coherent absorption in a plasmonic metamaterial film. The fully packaged fiberized version of the switch has been tested to the bandwidth of 1 GHz while free-space versions of the gate have been shown to provide 100 THz bandwidth and to operate at arbitrarily low intensities. Our work illustrates...
We report the first reconfigurable metamaterial based on the shape memory alloy. In the heating cycle structural elements of this metamaterials exhibit a hysteresis-type shape transformation that leads to non-volatile switching of its plasmonic properties.
Subwavelength-thickness all-dielectric nano-grating and nano-cantilever array metamaterials, actuated respectively by electrostatic and optical forces, provide reversible reflectivity changes of up to 20% and a giant sub-GHz frequency optomechanical nonlinearity at telecommunication wavelengths.
We apply holographic principles to tailor light emission resulting from the injection of free electrons into a nanostructured surface and demonstrate robust control over the direction, divergence, wavelength and topological charge of radiation emission.
We use SNOM-like optical fiber tips functionalized with plasmonic and metamaterial nanostructures to detect, amplify and control the near-field of free electrons in the spectral range from 450 to 850 THz.
Magnetic resonances can be achieved at visible and near-infrared frequencies in purely dielectric metamaterials via the coupling between pairs of closely spaced, dissimilar dielectric rods. We demonstrate this new phenomenon experimentally and explore how such structures may present giant nonlinear optical, bistable and asymmetric transmission responses driven by resonant optomechanical forces at...
We show experimentally that bistable, optically-induced phase switching in germanium antimony telluride (GST) — a member of the Te-based chalcogenide alloy family upon which all of today's re-writable optical disc and phase-change RAM technologies are based — provides a platform for the engineering of non-volatile metamaterial transmission/reflection modulators (Fig. 1) for near- to mid-infrared wavelengths...
We show experimentally for the first time that free-electron evanescent fields can be amplified by a plasmonic nanolayer in much that same way as optical evanescent fields are amplified in the poor-man's superlens.
For more than ten years now, significant effort has been focused on the engineering of metamaterials to achieve artificial optical magnetism, most notably for applications in negative refractive media. However, the challenges associated with the fact that the metals conventionally employed as the foundation of photonic metamaterials suffer from high inherent energy dissipation due to resistive losses...
Optical forces are extremely important in mesoscopic systems: they are increasingly exploited in various forms of optical tweezing, manipulation and binding, as well as for actuation of nanophotonic devices [1]. Here we introduce optomechanical dielectric metamaterials - a new paradigm for achieving strongly nonlinear, asymmetric and bistable optical properties via the mutual interaction of optical...
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