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„Nano-Optics and Ultrafast Dynamics“.

Supercontinuum generation (SCG) is a nonlinear optical process, in which intense, nearly monochromatic laser pulses form a continuous spectrum (“supercontinuum” or laser white light) with a broad optical bandwidth. One of the most significant aspects of SCG is that the white light carries the exceptional properties of laser radiation. Unfortunately, most white light sources – in particular commercially available variants – display unwanted intensity fluctuations. In collaboration with the University of California at Los Angeles, we have recently demonstrated a new approach towards controlling and stabilizing SCG. The method relies on mixing two synchronized quasi-monochromatic laser pulses in nonlinear optical fiber. The work is published in Physical Review Letters. more...

In our research, we utilize metallic nanostructures to localize and enhance nonlinear optical processes, such as multiphoton photoemission, in which several photons result in the release of one electron from a metallic surface. Recently, we have overcome the physical limitations of multiphoton photoemission in nanostructures, and have investigated the so-called “optical field emission” effect. The work was published in Physical Review Letters. more...