Exciton–vibrational coupling in the dynamics and spectroscopy of Frenkel excitons in molecular aggregates

Using coherence to enhance function in chemical and biophysical systems

“…Instead, the interplay among electronic and nuclear motions can lead to quite complicated vibronic levels and mixing between electronic and vibrational wavefunctions [34][35][36][37] . This mixing is Box 2…”

Vibrational relaxation beyond the linear damping limit in two-dimensional optical spectra of molecular aggregates

“…where U α (t) ≡ α|e i Ĥ B t e − i (H D SB +HB )t |α is evolution of bath in α eigenstate written in interaction picture andG is Green function of master equation (13).…”

“…Various variant of such a strategy has been simultaneously followed recently by several authors [10][11][12][13].…”

Size-dependent blinking of molecular aggregate total emission

“…The investigation of molecular aggregates (MAs) opens the possibility of creating new promising materials for optical technologies [1,2,3]. Photophysical properties of vibronic excitation in MAs are of crucial importance for systems ranging from organic dye solutions to artificial photosynthetic devices.…”

“…One of widely used methods to employ exciton-vibrational coupling in dynamics and spectroscopy of MAs is to use the theory of open systems by putting low-frequency vibrational degrees of freedom in a thermal reservoir characterized by its spectral function [2], whereas only the important degrees of freedom (typically only electronic) are included in a system Hamiltonian. However, recent research [4,5,6,1,7] show that this way is not always appropriate for calculations of optical response and study of exciton dynamics of such aggregates. These recent contributions have spurred interest to the exciton-vibrational coupling problem in molecular aggregates and resulted in a revision of theories of energy transfer and coherence in MAs, in particular, by explicit inclusion of a quantized vibrational mode in the system Hamiltonian.…”