Excitonic Photon Absorption-Emission Characteristics in ZnCdSe-ZnSe Single-Quantum-Well Structures

Abstract
Excitonic photon absorption and emission processes are investigated under zero or external electric fields on MOVPE grown (Zn1-x Cd x )Se-ZnSe:x=0.18 single quantum wells (SQWs). The effects of a dc electric field applied perpendicularly on absorption and emission processes are examined by electric field-controlled photoluminescence (PL), electroreflectance (ER) and photocurrent (PC) spectrum measurements. The characteristics of optically excited spontaneous and stimulated emissions from the SQWs are different in both spectrum peak energies and field effects from those expected in the heavy hole mass (H-H) exciton ground state (n=1) in quantum wells.