Abstract
We report continuous-wave (CW) lasing at 535 nm from a single lead halide perovskite (CsPbBr3) quantum dot (PQD) in a gap plasmon nanocavity with an ultralow threshold (lower than 90 mWcm-2) under 4 K. The ultrasmall mode volume dramatically enhances the light-matter interaction to achieve CW lasing. By raising the temperature, a clear lasing threshold can be observed at temperatures above 80 K. The demonstration of single QD lasing, which operates in the strong coupling regime, provides a new approach for realizing electrically driven lasing and integration into ultracompact optoelectronic devices. The detail mechanism of plasmonic lasing will be discussed.
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