Single-molecule spectroscopy.

Recent experimental and theoretical studies concerning single-molecule spectroscopy in solids are discussed. Pure quantum effects--such as photon bunching, antibunching, and spectral jumps--and more classical phenomena--such as near-field excitation, saturation, ac/dc Stark shifts, spectral diffusion, two-photon excitation, and customary spectroscopic analysis--are considered. The emphasis of this review is on physical results and their interpretation. This is preceded by a general introduction, where fundamentals of single-molecule spectroscopy are explained.