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S C HW E R P U N K T 45 03 | LICHT GEDANKEN Contact Silvio Fuchs Prof. Dr Gerhard G. Paulus Institute of Optics and Quantum Electronics Max-Wien-Platz 1, D-07743 Jena, Germany Phone: +49 36 41 9-47 615 +49 36 41 9-47 201 Email: silvio.fuchs@uni-jena.de gerhard.paulus@uni-jena.de www.ioq.uni-jena.de Original Publication Optical coherence tomography with nano- scale axial resolution using a laser-driven high-harmonic source. Optica (2017), DOI: 10.1364/OPTICA.4.000903 thods. Elements such as carbon, oxygen and nitrogen would themselves provide the contrast.« Before that is possible, however, the physicists of the University of Jena still have some work to do. »With the light sources we have at the moment, we can achieve a depth resolution down to 24 nanometres. Although this is sufficient for producing images of small struc- tures, for example in semiconductors, the structure sizes of current chips are in some cases already smaller. However, with new, even more powerful lasers, it should be possible in future to achieve a depth resolution of as little as three nanometres with this method,« notes Fuchs. »We have shown in principle that it is possible to use this method at laboratory scale.« The long-term aim could ultimately be to develop a cost-effective and user-fri- endly device combining the laser with the microscope, which would enable the semiconductor industry or biological la- boratories to use this imaging technique with ease. From right: Prof. Gerhard G. Paulus, Silvio Fuchs, Martin Wünsche and Dr Christian Rödel by a laser-driven X-ray source. The physicists want to make it possible to use X-ray pulses for new imaging procedures, for example for studying cells.