Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Institut für Physik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Kolloquium | Alle Termine | Institutskolloquium: Prof. Steve Cundiff (University of Michigan)

Institutskolloquium: Prof. Steve Cundiff (University of Michigan)

Vortrag: Optical Multi-Dimensional Coherent Spectroscopy of Atoms and Solids
  • Wann 28.06.2022 von 15:00 bis 17:00
  • Wo Zoom & Lise-Meitner-Haus, Christian-Gerthsen-Hörsaal, Newtonstraße 15, 12489 Berlin
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Institutskolloquium: Prof. Steve Cundiff (University of Michigan) spricht zum Thema:
Optical Multi-Dimensional Coherent Spectroscopy of Atoms and Solids

 

Abstract

The concept of multidimensional coherent spectroscopy originated in NMR where it enabled the determination of molecular structure. The key concept is to correlate what happens during multiple time periods between pulses by taking a multidimensional Fourier transform. The presence of a correlation, which is manifest as an off-diagonal peak in the resulting multidimensional spectrum, indicates that the corresponding resonances are coupled. Migrating multidimensional Fourier transform spectroscopy to the optical regime is difficult because phases are critical. I will give an introduction to optical two-dimensional coherent spectroscopy, using an atomic vapor as a simple test system. I will then present our use of it to study optical resonances due to excitons in semiconductor nanostructures and due to color centers in diamond.

 

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