Aart-Jan Verhoef, Ph.D. Technical University of Vienna Applications of femtosecond laser sources in attosecond physics and biomedical imaging The talk will cover three topics: Biomedical imaging, attosecond spectroscopy and the laser source development driving both fields forward. Using a novel Yb-fiber femtosecond amplifier neuronal activity up to 600 micrometer below the brain surface was measured, and the ability to reliably detect signals with a single pulse per voxel is demonstrated. Using attosecond time resolved spectroscopy we have been able to directly identify and measure different channels in the cascaded Auger decay in krypton. The same technique allowed us to also measure the apparent photo-ionization delay of different direct photo-ionization channels in xenon, including channels involving strong multi-electron dynamics (shake-up). Future directions in source development for application in attosecond science are towards tunable optical parametric amplifiers pumped and seeded by turnkey robust front-ends. A monolithic Yb-fiber chirped pulse amplifier developed for this purpose, which as demonstrated in this talk also drives forward biomedical imaging applications, will finally be presented. FRIDAY, APRIL 24, 2015 | 2:00 PM | HAWKING AUDITORIUM
© Copyright 2024