Particle accelerator on a nanophotonic chip

Seminar Start Date
Seminar End Date
Seminar Location
Jacobs School of Engineering 2nd floor, #2512 Henry Booker Conference room, 9500 Gilman Dr, La Jolla, San Diego, California 92093
Seminar Speaker
Professor Peter Hommelhoff
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Abstract

Particle accelerators are indispensable tools in science, industry and health care. Almost all of them are based on microwave driving. Based on a similar principle, acceleration of electrons with the help of laser light has already been proposed decades ago: Nanophotonic structures are needed that generate an optical near-field mode efficiently propelling the electrons. We could recently demonstrate the accelerator on a chip. Like in classical microwave accelerators, the electrons' momentum is not only increased but the electromagnetic forces also prevent the accelerated electrons from crashing into the structure walls. The talk will show the status of the field and give an outlook on what is needed to build a fully integrated laser-based electron accelerator on a chip, which might lead to new light sources or new medical treatment tools. Even the generation of special non-classical photon states seems within reach.

Seminar Speaker Bio
Dr. Peter Hommelhoff is a professor of physics at LMU Munich since 2024 and continues at FAU Erlangen, where he has been since 2012. He earned his diploma from ETH Zurich (1999) and his PhD from LMU (2002) under Prof. T. W. Hänsch. After postdoctoral work at Stanford with Prof. M. Kasevich, he led a Max Planck Research Group at the Max Planck Institute for Quantum Optics. He became director of the Chair for Laser Physics at FAU in 2012 and is a Fellow of the Max Planck Institute for the Science of Light. Hommelhoff’s research has contributed to laser science, including femtosecond electron sources and attosecond physics. He has received ERC Consolidator and Advanced Grants and co-led three Moore Foundation programs. He is a member of the German Physical Society and a recipient of the 2022 Gottfried Wilhelm Leibniz Prize.