TY - JOUR
T1 - Anomalous differential polarized phase angles for two-photon excitation with isotropic depolarizing rotations
AU - Lakowicz, Joseph R.
AU - Gryczynski, Ignacy
AU - Danielsen, Eva
N1 - Funding Information:
The authors acknowledge support from the National ScienceF oundation (DIR-87 10401 and DMB-8804921 , Center for Fluorescence Spectroscopya nd Institutional grants), the National Institutes of Health (RR-04800) and the Medical Biotechnology
PY - 1992/3/27
Y1 - 1992/3/27
N2 - We describe frequency-domain measurements of the anisotropy decay of 1,6-diphenylhexatriene resulting from one- and two-photon excitation. For two-photon excitation, the phase shifts (Δ) between the horizontally and vertically polarized components of the decay exceed the absolute maximum of 30° possible for one-photon excitation, and values of Δ as large as 37° were observed for 1,6-diphenylhexatriene in triacetin. These results are explained by the increased orientation of the photoselected population for two- as compared to one-photon excitation.
AB - We describe frequency-domain measurements of the anisotropy decay of 1,6-diphenylhexatriene resulting from one- and two-photon excitation. For two-photon excitation, the phase shifts (Δ) between the horizontally and vertically polarized components of the decay exceed the absolute maximum of 30° possible for one-photon excitation, and values of Δ as large as 37° were observed for 1,6-diphenylhexatriene in triacetin. These results are explained by the increased orientation of the photoselected population for two- as compared to one-photon excitation.
UR - http://www.scopus.com/inward/record.url?scp=0000963364&partnerID=8YFLogxK
U2 - 10.1016/0009-2614(92)85366-I
DO - 10.1016/0009-2614(92)85366-I
M3 - Article
AN - SCOPUS:0000963364
SN - 0009-2614
VL - 191
SP - 47
EP - 53
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-2
ER -