12-04, 15:50–16:40 (Europe/Luxembourg), Banquet Room
Over the last several years, significant progress has been made on the understanding of the requirements for design of laser-driven lightsails suitable for interstellar missions. Nanophotonic design principles can enable self-stabilizing optical manipulation, levitation and propulsion of ultralight microscopic and macroscopic-sized (i.e., micron, mm, cm, or even meter-scale) metasurface lightsails via radiation pressure from a high power density pump laser source. I will discuss new simulations and measurements to test the stringent criteria for metasurface lightsail design, dynamical and opto-mechanical stability, and thermal management. We discuss the optomechanical stability of lightsails in the linear and nonlinear regime, as well as first experimental radiation pressure characterization of small silicon nitride (<1 mm) microscale lightsails. We will also present results from multiphysics simulations that identify key issues for lightsail stability, and will give a vision for the design of large-scale lightsail spacecraft as well as considerations about design and integration of on-board instruments.
Harry Atwater is the Otis Booth Leadership Chair of the Division of Engineering and Applied Science, and the Howard Hughes Professor of Applied Physics and Materials Science at the California Institute of Technology. Atwater’s scientific effort focuses on nanophotonic light-matter interactions. His work spans fundamental nanophotonic phenomena and applications, including active wavefront shaping of light using metasurfaces, optical propulsion of lightsails, quantum and 2D nanophotonics as well as solar energy conversion, on earth and in space.
Atwater was an early pioneer in nanophotonics and plasmonics and gave a name to the field of plasmonics in 2001. Currently Atwater directs the Liquid Sunlight Alliance (LiSA), a Department of Energy Hub program for solar fuels, and is a PI of the Caltech Space Solar Power Project. He was also the founding Editor in Chief of the journal ACS Photonics. Atwater is a Member of the US National Academy of Engineering, a Fellow of APS, MRS, SPIE and Optica, a Web of Science Highly Cited Researcher from 2014-2024, and is recipient of numerous awards, including the 2021 von Hippel Award of the Materials Research Society.