Multifunctional far-field luminescence nanoscope for studying single molecules and quantum dots (50th anniversary of the Institute of Spectroscopy, Russian Academy of Sciences)

Far-field fluorescence spectromicroscopy of single quantum emitters (SQEs) (single molecules, quantum dots, color centers in crystals) is an actively developing field of modern photonics, which is in widespread demand in various applications in physics, chemistry, material sciences, life sciences, and quantum technologies. In this paper, we present a description of a multifunctional experimental setup which was developed in recent years at the Institute for Spectroscopy of the Russian Academy of Sciences. It allows measuring optical spectra and fluorescence images of SQEs, as well as their temporal behavior and luminescence kinetics, in a broad range of temperatures (from cryogenic to ambient). It is shown that the spatial coordinates of SQEs can be reconstructed with subdiffractional accuracy (up to a few angstroms). Some examples of the developed methods for multiparameter superresolution microscopy (nan„oscopy) of materials and nanostructures are presented.