TY - JOUR
T1 - Long-time spectral diffusion induced by short-time energy transfer in doped glasses
T2 - Concentration-, wavelength- and temperature dependence of spectral holes
AU - Den Hartog, F. T.H.
AU - Bakker, M. P.
AU - Silbey, R. J.
AU - Völker, S.
PY - 1998/11/27
Y1 - 1998/11/27
N2 - We discovered a remarkable effect: spectral diffusion (SD) induced by energy transfer (ET), here called ET → SD. The 'effective' homogeneous linewidth Γ′hom of the S1 ← S0 0-0 band of free-base chlorin (H2Ch) in polystyrene (PS) was followed as a function of concentration and excitation wavelength by hole-burning. The results cannot simply be explained by Förster's ET mechanism: (1) the increase of Γ′hom towards the blue is larger than expected and follows an S-shaped curve; (2) Γ′hom increases linearly with concentration; and (3) the holes are Lorentzian. A model is proposed which predicts that Γ′hom should increase with delay time, even at T → 0. This is confirmed by experiments.
AB - We discovered a remarkable effect: spectral diffusion (SD) induced by energy transfer (ET), here called ET → SD. The 'effective' homogeneous linewidth Γ′hom of the S1 ← S0 0-0 band of free-base chlorin (H2Ch) in polystyrene (PS) was followed as a function of concentration and excitation wavelength by hole-burning. The results cannot simply be explained by Förster's ET mechanism: (1) the increase of Γ′hom towards the blue is larger than expected and follows an S-shaped curve; (2) Γ′hom increases linearly with concentration; and (3) the holes are Lorentzian. A model is proposed which predicts that Γ′hom should increase with delay time, even at T → 0. This is confirmed by experiments.
UR - http://www.scopus.com/inward/record.url?scp=0011059051&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(98)01138-5
DO - 10.1016/S0009-2614(98)01138-5
M3 - Article
AN - SCOPUS:0011059051
SN - 0009-2614
VL - 297
SP - 314
EP - 320
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 3-4
ER -