Abstract

Organic dye molecules have been used in great many scientific and technological applications. Among these, the polycyclic aromatic hydrocarbons (PAH) behave very favourably as quantum emitters when embedded in organic crystals at temperatures below 4K. PAHs can serve as solid-state emitters with remarkable optical properties such as near-unity quantum efficiency and high photostability. However, transitions to short-lived molecular vibrational levels reduce the scattering cross section by a branching ratio of about 30-50%. In order to overcome this shortcoming and render the molecule as a two-level system, one can enhance its zero-phonon emission by using the Purcell effect, e.g., via coupling to an optical cavity, to obtain a near-unity branching ratio.

© 2017 IEEE