Tutorial Speaker

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Recent advances in the physics and applications of metamaterials

Abstract：

Metamaterials, artificial electromagnetic media that are structured on the subwavelength scale, were initially suggested for the negative-index media, and later became a paradigm for engineering electromagnetic space and controlling propagation of waves. Recently, we observed the emergence of a new branch of metamaterials and nanophotonics aiming at the manipulation of strong optically-induced electric and magnetic Mie-type resonances in dielectric and semiconductor nanostructures with high refractive index. Unique advantages of dielectric resonant nanostructures over their metallic counterparts are low dissipative losses and the enhancement of both electric and magnetic fields that provide competitive alternatives for metal-based plasmonic structures including nanoantennas, nanoparticle sensors, and metasurfaces. This talk will summarize the recent research concepts and results on electromagnetic and optical metamaterials and metadevices including metamaterials with hyperbolic dispersion, all-dielectric nanophotonics, and recently emerged fields of meta-optics and metasurfaces.

Title：

A review of fast speed solid state KTN beam deflectors

Abstract：

n this paper, we provide a brief review on fast speed solid state beam deflectors based on potassium titanalate niobate (KTN) electro-optic (EO) crystals. Different types of beam deflection mechanisms are addressed, including both the conventional uniform electric field but non-uniform geometric shape (e.g., prism shape) enabled beam deflection as well as non-conventional non-uniform electric field enabled beam deflection. The non-uniform electric field can be realized by several different approaches such as space-charge-controlled beam deflection, temperature gradient controlled beam deflection, and composition gradient controlled beam deflection. The advantages and limitations of each approach are discussed. Furthermore, we present the method of how to realize nanosecond speed, large aperture KTN beam deflection by overcoming the electric field induced phase transition. Finally, we discuss a variety of killer applications of fast speed solid state KTN beam deflectors, including high speed high resolution imaging and display, high speed 2D/3D printing, massive high speed optical storage, as well as all-solid state holographic systems.

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