Nonphotochemical hole burning of organic dyes and rare earth ions in polymers and glasses: a probe of the amorphous state

Fluorescence line narrowing: a high-resolution window on DNA and protein damage from chemical carcinogens

“…However, the absorber (impurity) does not undergo photodecomposition. Ionic dye molecules in alcoholic glasses and polymers (60,61) and chlorophylls in antenna complexes (40) are two classes that exhibit facile NPHB.…”