Upcoming seminars

Seminars at DIFFER cover a wide range of topics and are held on Thursdays at 11.15 AM in the seminar room of the institute (unless otherwise stated). Seminars are open to everybody. Please, contact the seminar secretary if you are interested in attending a talk. Please click here for an overview of the seminars which were organized at DIFFER in the past.

Seminar secretary: e [368] m [368] khan [28] differ [368] nl (Noortje Khan).

Reinoud Lavrijsen
February 23rd 2017
11:15 to 12:15
In this talk I will give an overview of my work on ultra-thin magnetic films (<1 nm) and hope to convey my excitement of the incredibly rich physics playground it offers. For instance; the recent observation that relativistic effects, initially considered useless/undetectable, have huge (unexpected) impact on magnetic nanotechnology. After a review of the basics of magnetism and thin film engineering I will show that this is not an obscure field and the basic technology is already widely integrated in your standard day. This will be the starting point of our recent discoveries and how we at the group physics of nanostructures contribute to the fundamental understanding using an experimental physics approach. Especially, our recent participation in the NWO-Gravitation project where we try to integrate magnetic racetrack memories into photonic circuits will be discussed. In the process I will detail our recent NanoAccess lab, a state-of-the-art UHV thin film deposition, analysis and manipulation facility open for collaborative projects as already undertaken with DIFFER.
David Smeulders
March 2nd 2017
11:15 to 12:15
Abstract will follow soon.
Thomas Ebbesen
March 9th 2017
11:15 to 12:15
Strong coupling of light and matter can give rise to a multitude of exciting physical effects through the formation of delocalized hybrid light-matter states. When molecular materials with high transition dipole moments are placed in the confined fields of metallic microcavities or surface plasmons, Rabi splittings approaching 1 eV are observed due to the interaction with the vacuum electromagnetic field. This leads to fundamental changes in the properties of the coupled system even in the dark.  While strong coupling has been extensively studied due to the potential it offers in physics such as room temperature Bose-Einstein condensates and thresholdless lasers, the implications for molecular and material science have remained mostly unexplored. After introducing the fundamental concepts, examples of modified properties under strong coupling, such as enhanced transport in organic semiconductors, energy transfer and chemical reactivity, will be given to illustrate the potential of light-matter states.
Frank Schuurmans
March 16th 2017
11:15 to 12:15
Abstract will follow soon.
Herman ten Kate
March 23rd 2017
11:15 to 12:15
A key technology in nowadays particle accelerators, colliders and their detectors is superconductivity. “No Higgs without Superconductivity” is a very striking phrase illustrating the quest for continuous research and development of high magnetic field superconducting magnets to allow even more powerful colliders in the future. The present Large Hadron Collider with 26 kilometer circumference comprises thousands of superconducting magnets for guiding the proton beams with the speed of light. In addition huge and powerful magnets are required in the particle detectors positioned around the collisions points for bending the collision products in order to determine their charge and momentum as required for identifying the decay products of new particles like the Higgs boson. The new developments and trends in this challenging technology will be presented. We will outlook to the next generation of magnet technology now on the drawing board for the Future Circular Collider with 100 km circumference and envisaged to provide 100 TeV collisions by medio 2045, a great mission for our generation to make a start and for our children to complete.