Karl Franzens University Graz
Graz University of Technology
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Karl Franzens University Graz | Graz University of Technology | |
Particle acceleration on a nanophotonic chip - and other ways of controlling electrons with ultrafast laser fields It is well known for decades that light can impart momentum to charged particles in the vicinity of a third body. With nanostructured dielectric materials and ultrafast laser pulses, this momentum transfer can become highly efficient, demonstrated in 2013 in two proof-of-concept experiments. Since then, not only acceleration has been shown but also deflection and focusing based purely on optical nearfield forces. With these ingredients at hand, we are now at a point to build an on-chip particle accelerator. In this talk, I will show where we stand in our quest to build an accelerator on a nanophotonic chip. In the second part of the talk, I will show how we can obtain insights to attosecond physics phenomena at the surface of metal needle tips. Here, too, electrons can be driven with intense few-cycle laser fields. When adding a second color to the fundamental field, we can disentangle electron emission and electron propagation dynamics. This way, we can now measure strongfield physics phenomena quantitatively at the surface of solids. |