期刊
ACS PHOTONICS
卷 8, 期 1, 页码 335-342出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.0c01586
关键词
titanium nitride; lead halide perovskites; plasmonics; nanolasers; upconversion lasing; ENZ
类别
资金
- Ministry of Science and Technology, Taiwan [MOST-106-2112-M-001036-MY3, MOST-109-2112-M-001-043-MY3, MOST-108-2221-E-001-018-MY3, MOST 108-2113M-006-005-MY3, MOST-109-2636-E-007-017]
- Academia Sinica [AS-CDA-108M08]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0019140]
The study demonstrates the improvement of upconversion efficiency and reduction of lasing threshold using single-mode upconversion lasing in a plasmonic nanocavity. This breakthrough in nanolaser technology has significant implications for various applications in photonics and nanotechnology.
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 mu J cm(-2)) and a calculated ultrasmall mode volume (similar to 0.06 lambda(3)) 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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