GAIN AND DYNAMICS IN ZNSE-BASED QUANTUM-WELLS

Gain spectroscopy and population dynamics are investigated in ZnCdSe/Z nSSe/ZnMgSSe separate confinement heterostructure (SCH) diode lasers. Both steady state and time-resolved methods are applied to characteriz e the dense electron-hole pair gas in the ZnCdSe active quantum well ( QW) region from 77 K to room temperature. Effects due to the carrier i nteraction with optical phonons and electron-hole Coulomb effects are discussed. A direct measurement of the carrier lifetime at pair densit ies under typical laser conditions has also been obtained.