CdS_xSe_1-x/ZnS semiconductor nanocrystal laser with sub 10kW/cm^2 threshold and 40nJ emission output at 600 nm

Abstract

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Amplified Spontaneous Emission Threshold Reduction and Operational Stability Improvement in CsPbBr3 Nanocrystals Films by Hydrophobic Functionalization of the Substrate

“…This lack of knowledge is particularly relevant for the possible applicative perspectives of perovskites lasers. Even if femtosecond pumping typically allows higher photostability of the active materials, it can be obtained by complex and expensive lasers, not compatible with the development of low costs optically pumped lasers 61 . On the contrary nanosecond pulses with high enough energy to obtain ASE and lasing can be obtained by low cost sources like pulsed laser diodes 62 and pulsed LEDs 63 .…”

Polymer-II-VI Nanocrystals Blends: Basic Physics and Device Applications to Lasers and LEDs

“…Further improvements in terms of threshold lowering under nanosecond pump pulses were recently obtained [86] in a bilayer DFB lasers with an active alloyed core/shell CdSxSe1−x/ZnS quantum dots deposited on a pre-patterned silica substrate and over-coated with a polyvinyl alcohol (PVA) layer. The PVA layer acts as an encapsulating barrier for oxygen and allows to have a more symmetric refractive index profile, thus improving the mode confinement in the active layer and increasing the gain.…”

Advances and prospects of lasers developed from colloidal semiconductor nanostructures

“…In order to achieve the single longitudinal mode operation, the distributed feedback (DFB) lasers are fabricated from the CQD/grating hybrids (Fig. 16f) [20,[130][131][132][133]. The DFB lasers can also be made mechanically flexible by using the ultra-thin glass membrane substrate, enabling new functionalities of CQD-based lasers [131].…”