Kiel Nano, Surface and Interface Science (KiNSIS)

Nanooptics in the electron microscope (Prof. Dr. Mathieu Kociak, Université Paris Sud, France)

Jan 12, 2021 from 04:15 PM to 05:45 PM

Zoom video conference

Mathieu KociakHunting optical phenomena at the nanometer scale, namely performing nanooptics, is paradoxical. On the one hand, the typical length-scale relevant for optics is of the order of a visible radiation wavelength: few hundred of nanometers. On the other hand, optical properties of nano-objects become to depart from bulk properties when the nano-objects become smaller than a few hundred of nanometers. In this case, the optical properties depend on minute variations of the size and shape of the nano-objects, and sometimes the morphology or structure of nano-objects have to be known with atomic resolution. Therefore, techniques that are not limited by the optical diffraction limit have been developed in the last 15 years to make possible to study novel optical nanomaterials and the novel physics they brought.

In this talk, I will present the use of free electron beams – such as delivered in a transmission electron microscope – to perform optical spectroscopy at the nanometer scale. I will show how they can be used to map phonons, plasmons and excitons with unbeatable spatial resolution, and even in 3D. Beyond their impressive success in generating nice images, I will show how it is now possible to quantitatively understand such experiments in pure optical terms, such as extinction and scattering cross-sections or electromagnetic local density of states. I will also emphasize recent developments in ultra-high spectral resolution that makes it possible to tackle new field of nanooptics, such as the study of strong coupling between plasmons and excitons or phonons.

Access to the video conference

Talk within the "Physikalisches Kolloquium", everybody is cordially invited.

Inviter: Prof. Talebi

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« January 2021 »
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  • 12:00: KiNSIS Colloquium: Dynamical Networks - A Primer (Hermann Kohlstedt, Chair of Nanoelectronics, CAU)
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11 12
  • 16:15: Nanooptics in the electron microscope (Prof. Dr. Mathieu Kociak, Université Paris Sud, France)
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13 14
  • 16:00: Multiscale modeling of magnetorheological elastomers: From magneto-mechanical actuators to magneto-electric sensors (Prof. Dr.-Ing. Marc-André Keip, Uni Stuttgart)
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15 16 17
18 19
  • 16:15: What can we “learn” from atoms? (Prof. Alexander Ako Khajetoorians, Radboud University, Netherlands)
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20 21
  • 17:00: Translational Breath Research for Clinical Diagnosis and Therapeutic Monitoring (Pablo Sinues, University of Basel)
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22 23 24
25 26
  • 16:15: Inaugural lecture: Theory and simulation of strongly correlated plasmas and dense matter (Dr. Hanno Kählert, ITAP, CAU)
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27 28
  • 16:00: Nanoscale Self-assembly and Electrical Function (Marc Tornow, TU Munich)
  • 17:00: Leben auf Exoplaneten? 1. Akt (Prof. Dr. Ruth Schmitz-Streit, Prof. Dr. Wolfgang J. Duschl, Prof. Dr. Ulrich Lüning)
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