|Title:||Light Control with Metamaterials and Plasmonic Structures|
|Group/Series/Folder:||Record Group 8.15 - Institute for Advanced Study|
Series 3 - Audio-visual Materials
|Notes:||IAS Distinguished Lecture.|
Croucher Advanced Study Institute on New Materials and New Concepts for Controlling Light and Waves. Tutorial no.4
Title from lecture slide: Light Control in Metamaterials and Nanophotonics Structures.
Host: HKUST Institute for Advanced Study.
Sponsor: The Croucher Foundation.
Abstract: We discuss our recent advances in the control of light propagation in metamaterials and plasmonic structures. First, we suggest and demonstrate experimentally the functional metamaterials in which microwaves interact with externally imposed patterns of light. We fabricate a light-tunable microwave metamaterial structure and prove its unique functionalities for reflection, shaping, and focusing of electromagnetic waves.
For optical metamaterials, we demonstrate an efficient polarisation-dependent control of spontaneous emission of quantum dots through their coupling to magnetic metamaterials, and a sharp difference in the interaction of quantum dots with magnetic and electric resonances of the split-ring optical metamaterial. We also discuss novel effects in plasmonic core-shell nanoparticles that support both electric and artificial magnetic dipolar modes; when such modes are engineered to coincide spectrally with the same strength, the interferences of these two resonances result in azimuthally symmetric unidirectional scattering, which can be further improved by arranging the nanoparticles in a chain, with both azimuthal symmetry and vanishing backward scattering preserved over a wide spectral range. In particular, this property can lead to a number of new physical effects such as the polarization independent plasmonic Fano resonances.
Duration: 90 min.
|Appears in Series:||8.15:3 - Audio-visual Materials|
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