Coherent multidimensional optical spectroscopy of excitons in molecular aggregates; quasiparticle versus supermolecule perspectives.

Molecular aggregates are abundant in nature; they form spontaneously in concentrated solutions and on surfaces and can be synthesized by supramolecular chemistry techniques.1-3 Assemblies of chromophores play important roles in many biological processes such as light-harvesting and primary * To whom correspondence should be addressed. E-mail: smukamel@uci.edu. † University of California Irvine. ‡ Universität Würzburg. § Charles University. Chem. Rev. 2009, 109, 2350–2408 2350