Composite Probes and Use Thereof in Super Resolution Microscopy

The technology is in the field of fluorescence microscopy. More specifically, the invention describes and claims the composite probes for super resolution optical techniques using super resolution via transiently activated quenchers (STAQ). The composite probes include a donor moiety and an acceptor moiety joined by a linker. The acceptor moiety, when excited by incident radiation, is excited to a state which, for example, absorbs in the donor emission region, such that the acceptor moiety in its excited state quenches at least a portion of the donor moiety emission. Other transiently activated quenching mechanisms and moieties could accomplish the same task by reducing donor population. Also disclosed are methods for irradiating a selected region of a target material including the composite probe, wherein the composite probe enables improved resolution by point spread function modification.