Recent experimental and theoretical studies concerning single-molecule
spectroscopy in solids are discussed. Pure quantum effects-such as ph
oton bunching, antibunching, and spectral jumps-and more classical phe
nomena-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 r
esults and their interpretation. This is preceded by a general introdu
ction, where fundamentals of single-molecule spectroscopy are explaine
d.