期刊
ACS NANO
卷 14, 期 9, 页码 11670-11676出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c04224
关键词
CW lasing; lead halide perovskites; plasmonics; spaper; nanolaser; quantum dots; gap plasmon
类别
资金
- Ministry of Science and Technology of Taiwan [MOST-106-2112-M-001-036-MY3, MOST-109-2112-M-001-043-MY3, MOST-108-3116-F-007-002, MOST-109-2636-E-007-009, MOST-109-2634-F-007-023, MOST-108-2221-E-001-018-MY3]
- Academia Sinica of Taiwan [AS-CDA-108-M08, AS-SS-109-05, AS-iMATE-109-41]
Lead halide perovskite materials have recently received considerable attention for achieving an economic and tunable laser owing to their solution-processable feature and promising optical properties. However, most reported perovskite-based lasers operate with a large lasing-mode volume, resulting in a high lasing threshold due to the inefficient coupling between the optical gain medium and cavity. Here, we demonstrate a continuous-wave nanolasing from a single lead halide perovskite (CsPbBr3) quantum dot (PQD) in a plasmonic gap-mode nanocavity with an ultralow threshold of 1.9 Wcm(-2) under 120 K. The calculated ultrasmall mode volume (similar to 0.002 lambda(3)) with a z-polarized dipole and the significantly large Purcell enhancement at the corner of the nanocavity inside the gap dramatically enhance the light-matter interaction in the nanocavity, thus facilitating lasing. The demonstration of PQD nanolasing with an ultralow-threshold provides an approach for realizing on-chip electrically driven lasing and integration into on-chip plasmonic circuitry for ultrafast optical communication and quantum information processing.
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