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2018 Van Horn Distinguished Lectures: tunable light-matter interactions

1,416 views · Published 16 May 2018 · 1:09:22 · Indexed 21 September 2026

Channel: bhadeshia123 · 2018 · Education

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The Kent R. van Horn Lectureship is an endowed Lectureship at the Case Western Reserve University and dates from 1974. It honours Kent R. van Horn, an alum, who had a distinguished career as a metallurgist, director of research, and ultimately corporate vice-president of Alcoa. Three lectures on varied topics are to be delivered over three successive days. The 2018 lectures were delivered by Professor Harry A. Atwater of the California Institute of Technology. 

These videos are reproduced courtesy of the Materials Science and Engineering Department of Case Western Reserve University and with the permission of Professor Harry A. Atwater.

http://engineering.case.edu/emse/node/121
http://www.phase-trans.msm.cam.ac.uk

2018 Van Horn Distinguished Lectures: part 2
Tunable light-matter interactions in two-dimensional materials and metasurfaces

Abstract:

Research in nanophotonic materials and design is yielding advances that are opening conceptually new paths to address “grand challenges” that have not previously been achievable. One of these is the realization of comprehensively tunable nanoantenna arrays, which can enable dynamic, active control of all of the key constitutive properties of light – amplitude, phase, wavevector and polarization – opening new applications such as phased-array optical beam steering, visible light modulation for communication and thermal radiation management. Electronic tuning of the complex dielectric function of nanostructured materials is enabling i) scientific exploration of new two-dimensional and layered materials such as graphene and black phosphorus and transition metal dichalcogenide and also ii) plasmonic and nanophotonic device applications for dynamic wavefront control, including electronic phase and amplitude modulators for the near infrared (conducting oxides) and mid infrared (graphene). I will discuss advances in the realization of dynamically tunable metasurfaces in the near-infrared and mid-infrared with tunable spontaneous emission rate, tunable emissivity,  π phase modulation, tunable control of polarization, and ‘perfect’ absorption approaching 100% in submonolayer thickness structures.

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