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Title: [Transformation Optics, Invisibility, & Control of Electromagnetic Fields; Non-locality and the Limits to Sub-wavelength Focussing]
Originating Office: IAS
Speaker: Pendry, John
Issue Date: 3-Oct-2012
Event Date: 3-Oct-2012
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 EF
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