Seminars

Host: Martin Wolf

Water Flows in Carbon Nanochannels, from Carbon Memories to Quantum Friction

The emerging field of nanofluidics explores the molecular mechanics of fluids. This world of infinitesimal fluidics is the frontier where the continuum of fluid dynamics meets the atomic nature of matter, or even its quantum nature. Nature fully exploits the fluidic oddities at the nanoscale and it is capable of breath-taking technological feats using a fluidic circuitry made of multiple biological channels, such as ionic pumps, proton engines, ultra-selective pores, stimulable channels, ... [more]

On-Surface Chemistry of Helicenes

  • Department Online Seminar
  • Date: May 2, 2022
  • Time: 11:00 AM (Local Time Germany)
  • Speaker: Karl Heinz Ernst
  • EMPA, Dübendorft, Switzerland
  • Host: Martin Wolf
Surfaces functionalized with helicenes are of interest for chiroptical electronic devices or for electron-spin filtering. While self-assembled layers facilitate studying interesting phenomena, covalently linked chiral modified materials would be much more robust and therefore better suited for applications. [more]

The discovery and applications of topological quasiparticles by ultrafast microscopy

  • PC Department Online Seminar
  • Date: Oct 19, 2021
  • Time: 11:00 AM (Local Time Germany)
  • Speaker: Prof. Hrvoje Petek
  • University of Pittsburgh
  • Host: Martin Wolf
Surface plasmon polaritons (SPP) are composite electromagnetic field-charge density wave collective modes that propagate at metal/dielectric interfaces at the local speed of light. The circulation of their fields from transverse to longitudinal causes a transverse spin angular momentum (SAM) locking known as quantum spin-Hall effect, which embodies the property of evanescent waves, such as SPPs, that changing the sign of the photon momentum direction changes the sign of its spin. In other words, the oppositely propagating SPP waves possess the opposite spin. SPP fields can also carry optical angular momentum (OAM), which can focus them into plasmonic vortices. [more]
Go to Editor View