Probing of single acceptors in a wide ZnSe-based quantum well via optical spectroscopy

Abstract Using low-temperature (5 K) micro-photoluminescence measurements of a ZnSe/ZnMgSSe quantum well, isolated (quantum) emitters produced by interacting acceptor and hydrogen-like donor have been found and studied. These emitters enable optical probing of a single acceptor (donor) center if the nature of the donor (acceptor) constituting the distant donor-acceptor pair is known. Here we demonstrate the simplest realization of proposed optical probing: frequencies of optically active phonons are successfully determined for different types of single residual acceptors in a ZnSe-based quantum well.