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Transformation optics makes use of coordinate transformations to explore the possibilities offered by artificially structured metamaterials for the manipulation of a wide variety of electromagnetic phenomena. Since a decade, transformation optics has consistently extended its scope. Initially, coordinate transformations were only applied to the transformation of light in the simplest of optical setups,...
In the interaction between light and matter, linear momentum can be transferred from electromagnetic waves to particles to generate so-called optical forces. Recently, it has been suggested that optical gradient forces can be used to actuate nanophotonic devices since measurable displacements can be achieved [1]. The typical setup consists of two waveguides positioned in each other's vicinity such...
We show how transformation optics can enhance optical forces between two optical waveguides by several orders of magnitude by altering the perceived distance between the waveguides. This transformation can be implemented using single-negative metamaterial films.
We develop a novel approach to create optical resonators by applying the geometrical technique of transformation optics and we show that the fundamental diffraction limit can be overcome inside metamaterials with right-handed material parameters.
We demonstrate how transformation optics can be used to amplify optical gradient forces. We show how meta-materials allow to enhance optical forces between waveguides over several orders of magnitude, even when realistic losses are included.
We apply transformation optics to the Robertson-Walker metric and retrieve an analogue of the cosmological redshift. This linear time-dependent medium perfectly converts the frequency of wavepackets without the creation of sidebands.
We use transformation optics to design an optical cavity that allows for the subwavelength confinement of light. Our cavity combines a deep subwavelength mode volume with the absence of intrinsic (bending) losses.
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