Light interacts with matter all the time. This
interaction allows us to see, study and even control and change the world. Most
of those interactions are weak and involve a non-reversible exchange of energy.
For example, a material can absorb incoming light and
then use that energy for something else. But in some cases, the light and
matter can exchange energy reversibly. This means that the electromagnetic
field can give energy to the material, which can give it back to the
electromagnetic field, and so on and so forth. When this happens, we say that
light and matter are strongly coupled. Moreover, if the energy exchange rate is
of more than 10% the usual frequency at which the material absorbs light, we
say that light and matter are ultrastrongly coupled.
In this popular science talk, I will go through the
basics of the response of materials to light and the different regimes of
interaction: weak, strong and ultrastrong coupling. For
each regime, I will describe some interesting phenomena that can be observed.
Additionally, I will cover some exciting new results we
have been working on recently.
In case you are not sure yet, whether you want to attend or not, we have prepared a decision tree that might help you!
Click to get a larger picture.
11 October, John Andersson, Applied Chemistry Lab, Department of Chemistry
26 October (Tuesday), Sobhan Sepehri, VIDEM AB and RISE
8 November, Emelie Vilhelmsson Wesén, Chemical Biology Lab and FoRmulaEx, Department of Biology and Biological Engineering
22 November, Jesper Nilsson, Chemistry and Biochemistry Lab and FoRmulaEx, Department of Chemistry
6 December, Juliette Monsel, Applied quantum physics Lab, Department for Microtechnology and Nanoscience
27 September, 2021, 15:00
27 September, 2021, 16:00