Heidelberg 2015 – scientific programme

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MO: Fachverband Molekülphysik

MO 4: Cold Molecules 1

MO 4.8: Talk

Monday, March 23, 2015, 16:15–16:30, PH/SR106

Superradiance of Organic Molecules Attached to the Surface of Solid Neon Cluster — •Sharareh Izadnia, Markus Müller, Aaron LaForge, and Frank Stienkemeier — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str.3 ,79104 Freiburg

Superradiance [1] is a collective effect where all excited states simultaneously emit radiation. This can lead to a reduced effective lifetime and an enhancement in the radiative intensity, which has been observed almost universally in weakly interacting systems such as hot dense gases [2] and films [3] and Bose-Einstein-Condensates [4]. Recently, we observed a new superradiative system where large immobile chromophores (e.g. tetracene, pentacene, PTCDA) attached to the surface of neon clusters exhibit the characteristic lifetime shortening of superradiance.

In this talk, we will present absorption spectra, emission spectra, and fluorescence lifetime measurements which indicate the first observation of superradiance in such a system.

[1] R. H. Dicke, Phys. Rev. 93, 99 (1954).

[2] N. Skribanowitz, I. P. Herman, J. Macgilli, and

M. S. Feld, Phys. Rev. Lett. 30, 309 (1973).

[3] M. Müller, A. Paulheim, A. Eisfeld, and M. Sokolowski,

J. Chem. Phys. 139, 044302 (2013).

[4] D. Schneble, Y. Torii, M. Boyd, E. W. Streed, D. E.

Pritchard, and W. Ketterle, Science 300, 475 (2003).