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We demonstrate strong optical activity (and circular dichroism) for both microwave and photonic achiral planar metamaterials. The effect arises from extrinsic chirality resulting from oblique incidence of light onto the metamaterial structures.
A new method for nano-engineering the optical antenna properties of scanning probe tips by combining focused ion beam milling with nano-CVD is presented. We demonstrate the capabilities by probing specific vector-field components of plasmonic nanostructures.
The generation of vectorial beams at 1064 nm by the use of polarization transformer devices consisting of space-variant subwavelength gratings (SGs) is demonstrated experimentally. We discuss using such beams for plasmonic nanofocusing applications.
The field of optics is finding myriad applications in information technology, health care, lighting, sensing and national security. This paper explores the role of nanotechnology with special focus on nanophotonics in dielectric and inhomogeneous metamaterials with applications for optical information processing in space and time, communications, and sensing.
The optical properties of gold nanorods suspended in toluene are studied as a function of orientation by aligning them with a low frequency electric field. The nonlinear optical response is consistent with a 2-level saturation model.
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