TY  - JOUR
A1  - Xiong, Tao
A1  - Wlodarczyk, Radoslaw
A1  - Saalfrank, Peter
T1  - Vibrationally resolved absorption and fluorescence spectra of perylene and N-substituted derivatives from autocorrelation function approaches
JF  - Chemical physics : a journal devoted to experimental and theoretical research involving problems of both a chemical and physical nature
N2  - Vibrationally resolved absorption and emission (fluorescence) spectra of perylene and its N-derivatives in gas phase and in solution (acetonitrile) were simulated using a time-dependent approach based on correlation functions determined by density functional theory. By systematically varying the number and position of N atoms, it is shown that the presence of nitrogen heteroatoms has a negligible effect on the molecular structure and geometric distortions upon electronic transitions, while spectral properties change: in particular the number of N atoms is important while their position is less decisive. Thus, the N-substitution can be used to fine-tune the optical properties of perylene-based molecules.
KW  - Perylene
KW  - Vibronic spectrum
KW  - Correlation function
KW  - Dimer
KW  - Excimer
KW  - PCM
Y1  - 2018
U6  - https://doi.org/10.1016/j.chemphys.2018.06.011
SN  - 0301-0104
SN  - 1873-4421
VL  - 515
SP  - 728
EP  - 736
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schiefele, Juergen
A1  - Henkel, Carsten
T1  - Bosonic enhancement of spontaneous emission near an interface
JF  - Modern physics letters : A, Particles and fields, gravitation, cosmology, nuclear physics
N2  - We show how the spontaneous emission rate of an excited two-level atom placed in a trapped Bose-Einstein condensate of ground-state atoms is enhanced by bosonic stimulation. This stimulation depends on the overlap of the excited matter-wave packet with the macroscopically occupied condensate wave function, and provides a probe of the spatial coherence of the Bose gas. The effect can be used to amplify the distance-dependent decay rate of an excited atom near an interface.
KW  - Bose-Einstein condensation
KW  - Correlation function
KW  - Bosonic stimulation
KW  - Superradiance
KW  - Spontaneous decay
KW  - Cavity-quantum electrodynamics
Y1  - 2011
U6  - https://doi.org/10.1016/j.physleta.2010.11.058
SN  - 0375-9601
VL  - 375
IS  - 3
SP  - 680
EP  - 684
PB  - Elsevier
CY  - Amsterdam
ER  -