激光阈值
光子上转换
材料科学
纳米激光器
等离子体子
光电子学
激光器
光子学
纳米晶
激光泵浦
光学
纳米技术
物理
兴奋剂
波长
作者
Yu Lu,Teng Lam Shen,Kang-Ning Peng,Pi-Ju Cheng,Shu‐Wei Chang,Ming Lu,Chih‐Wei Chu,Tzung-Fang Guo,Harry A. Atwater
出处
期刊:ACS Photonics
[American Chemical Society]
日期:2020-12-28
卷期号:8 (1): 335-342
被引量:29
标识
DOI:10.1021/acsphotonics.0c01586
摘要
The understanding of nonlinear light–matter interactions at the nanoscale has fueled worldwide interest in upconversion emission for imaging, lasing, and sensing. Upconversion lasers with anti-Stokes-type emission with various designs have been reported. However, reducing the volume and lasing threshold of such lasers to the nanoscale level is a fundamental photonics challenge. Here, we demonstrate that the upconversion efficiency can be improved by exploiting single-mode upconversion lasing from a single organo-lead halide perovskite nanocrystal in a resonance-adjustable plasmonic nanocavity. This upconversion plasmonic nanolaser has a very low lasing threshold (10 μJ cm–2) and a calculated ultrasmall mode volume (∼0.06 λ3) at 6 K. To provide the unique feature for lasing action, a temporal coherence signature of the upconversion plasmonic nanolasing was determined by measuring the second-order correlation function. The localized-electromagnetic-field confinement can be tailored in titanium nitride resonance-adjustable nanocavities, enhancing the pump-photon absorption and upconverted photon emission rate to achieve lasing. The proof-of-concept results significantly expand the performance of upconversion nanolasers, which are useful in applications such as on-chip, coherent, nonlinear optics, information processing, data storage, and sensing.
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