Dartmouth Events

Reconfigurable Photonics: A phase change for the better

Engineering research seminar with Carlos A. Rios Ocampo, Postdoctoral Associate, MIT

Wednesday, January 27, 2021
3:30pm – 4:30pm
Intended Audience(s): Public
Categories: Lectures & Seminars

Zoom link
Meeting ID: 977 8641 2305 
Passcode: 687612

The integration of phase-change materials (PCMs) to photonic devices such as integrated circuits, plasmonic waveguides, multilayer stacks, and metasurfaces has enabled a long-sought functionality: nonvolatile reconfiguration. This functionality allows photonic systems to be active (i.e., access multiple optical responses) using power to switch between configurations but zero power to retain any. This unprecedented combination of properties, which are of extreme importance in any photonics technology, is possible because PCMs (chalcogenides exemplified by Ge-Sb-Te alloys) exhibit large and nonvolatile optical properties modulation upon a reversible solid-state phase transition.

In this talk, I will present the state-of-the-art of this novel, fast-growing field together with its challenges and potential. I will focus on my research combining photonics and phase-change materials to develop in-memory computing on integrated photonic architectures, nonvolatile switching fabrics, reconfigurable metasurfaces, bistable displays, and tunable topological photonics. Additionally, I will discuss current efforts towards developing application-specific Optical PCMs, hybrid electro-optical devices enhanced by PCMs and 2D materials, and pathways to bridge other gaps in the photonic materials field – which my research aims to tackle.

For more information, contact:
Ashley Parker

Events are free and open to the public unless otherwise noted.