Laser Devices Based on One- and Two-Photon Pumped Semiconductor Core-Shell Quantum Dots
I. Fortunati, S.Gardin, F. Todescato, R. Signorini, R. Bozio, J.J. Jasieniak, A. Martucci, G. Della Giustina, A. Pistore, G. Brusatin, M. Guglielmi, M. Prasciolu and F. Romanato
Highly luminescent CdSe-ZnS core-shell nanocrystals are utilized as dopant within ZrO2 and HfO2 hybrid sol-gel matrices. The emission properties of these hybrid materials are studied upon one- and two-photon excitation by fs laser pulses. Under these optical pumping regimes, low-threshold amplified stimulated emission is observed. Furthermore, the optical gain characteristics of these QD hybrid materials within 1D and 2D distributed feedback laser architectures are explored.
Keywords: Quantum dots, Two-photon absorption, Up-converted Lasing, sol-gel, imprinting, lithography, DFB laser.