Title: Integration of Subwavelength Nanostructures in Silicon Waveguides: New Phenomena and Applications.
When: Wednesday, November 22, (2017), 12:00.
Place: Department of Condensed Matter Physics, Faculty of Science, Module 3, Seminar Room (5th Floor).
Speaker: Alejandro Martínez, Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain.
Dielectric and metallic nanostructures can be tailored to provide unusual interaction with light waves. For example, they support localized resonances highly sensitive to the surroundings, complex scattering patterns and ultrafast nonlinearities. When arranged in 2D or 3D lattices, they form metasurfaces and metamaterials that enable to manipulate free-space light beams at will. However, the properties of such nanostructures also manifest when isolated, which could be used to advance in the miniaturization of photonic integrated circuits as well as to achieve new functionalities. This could lead to hybrid plasmonic-photonic circuits consisting of subwavelength processing units linked by lossless dielectric waveguides. In this seminar, I will review recent work in my research group on the integration of dielectric and metallic nanostructures with silicon waveguides. Amongst other findings, I will talk about the spin-orbit interaction arising when the nanostructure is places asymmetrically with respect to the waveguide axis, as well as the new functionalities (polarization synthesis, Stokes nanopolarimetry) it may enable.