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Metamaterials are designed to achieve unprecedented light-matter interactions. Here we demonstrate a novel viable and scalable assembly route to optical metamaterials with structures dictated by their own light-matter interactions.
Here, we exploit implementation of optical losses to develop innovative optical phenomena and devices, for example, mimicking exceptional points and their unique transport characteristics in optics at both nano and macro scales.
In this work we showcase two novel examples of electro-optic modulators (EOM) for ultrafast and low-power future transmitters. Unlike weak-interacting EOM design, which often require high feedback in form of high-Q cavity design we deploy novel materials and metal-based approaches. Both devices are based on novel materials, namely Graphene [1] and Indium-Tin-Oxide (ITO) [2], and feature the Silicon-on-Insulator...
We demonstrate truly deep sub-wavelength nanoscale metamaterial optical nanocavities with anomalous scaling laws, by incorporating indefinite metamaterials with hyperbolic dispersion. Cavities with sizes down to ∼ λ/20 and high effective refractive index of 17.4 are realized.
Graphene optical modulator has several prominent advantages, such as small footprint, fast modulation speed, broad operation bandwidth and insensitivity to the temperature. In this talk we will go over the recent progresses in our group.
We realize three-dimensional nanoscale optical cavities with anomalous scaling laws, by incorporating indefinite metamaterial with hyperbolic dispersion. Optical cavities with sizes down to ∼ λ/12 and high refractive index of 17.4 are demonstrated.
In this paper, we discuss the development of a bulk negative refractive index metamaterial made of cascaded “fishnet” structures, with a negative index existing over a broad spectral range. We describe in detail the design of bulk metamaterials, their fabrication and characterization, as well as the mechanism of how coupling of the unit cells can reduce loss in the material through an optical transmission-line...
We report the first bulk metamaterials at visible frequencies that shows intriguing negative refraction for all incident angles. The metamaterial is realized by growing silver nanowire in a porous alumina template.
We experimentally demonstrate cloaking at optical frequencies. A dielectric carpet cloak is designed to hide object under a curved reflecting surface by mimicking the reflection from a flat surface, enabling broadband invisibility with low loss.
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