|Title:||[Transformation Optics, Invisibility, & Control of Electromagnetic Fields; Non-locality and the Limits to Sub-wavelength Focussing]|
|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.1
First title from lecture slide and second title from event program.
Host: HKUST Institute for Advanced Study.
Sponsor: The Croucher Foundation.
Abstract: We describe a general class of plasmonic systems designed to collect incident light over a broad spectrum and concentrate the energy into a very small volume. The resulting density of radiation can be exploited for enhanced molecular sensing and realising non-linear effects at low power levels. However the degree of enhancement is limited by the delocalisation of surface charge implied by the quantum nature of the electron liquid inside a metal.
First we construct a broad band absorber whose geometry is sufficiently simple for the spectrum to be calculated analytically. The spectrum is continuous and energy captured from a dipole source escapes to infinity. Next we apply a transformation that inverts the structure so that in the new structure light from a uniform electric field, e.g. an incident plane wave, is harvested to the origin.
Duration: 89 min.
|Appears in Series:||8.15:3 - Audio-visual Materials|
Videos for Public -- Distinguished Lectures