Perovskite Quantum Dot Lasing in a Gap-Plasmon Nanocavity with Ultralow Threshold.

Autor: Hsieh YH; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan., Hsu BW; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan., Peng KN; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan., Lee KW; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan., Chu CW; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan., Chang SW; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan., Lin HW; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan., Yen TJ; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan., Lu YJ; Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.; Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2020 Sep 22; Vol. 14 (9), pp. 11670-11676. Date of Electronic Publication: 2020 Jul 29.
DOI: 10.1021/acsnano.0c04224
Abstrakt: 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 (CsPbBr 3 ) 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 (∼0.002 λ 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.
Databáze: MEDLINE
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