Publication date: 15th December 2025
Metal halide perovskite nanocrystals (PeNCs) represent outstanding gain materials for optically pumped lasing, providing high and tunable optical gain that can be achieved at comparatively low thresholds[1]. Amplified spontaneous emission (ASE) functions both as a performance benchmark and as a diagnostic tool for guiding the development of practical PeNC-based laser technologies.
The talk will offer an overview of the group’s investigations into the ASE properties of CsPbX₃ nanocrystals (X = Br, I), together with recent advances involving Pb-free CsSnI₃ nanocrystals. It will first examine the ASE behavior of PeNC thin films operating as simple optical waveguides, followed by a discussion of strategies for optimizing ASE. These include improved waveguiding through polymer–PeNC multilayer architectures[2] and the demonstration of stimulated emission in free-standing membranes[3], representing progress toward flexible, optically pumped PeNC lasers. Lastly, the talk will present new results on nanosecond-excited ASE in long-range ordered nanocrystal superlattices and compare their performance with that of conventional glassy PeNC thin films.
This work was financially supported by the Research and Innovation Foundation of Cyprus under the “NEW STRATEGIC INFRASTRUCTURE UNITS-YOUNG SCIENTISTS” Programme (Grant Agreement No. “INFRASTRUCTURES/1216/0004”, Acronym “NANOSONICS”).
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