材料科学
等离子体子
光电子学
激光器
激光阈值
纳米线
光子学
波长
光学
吸收(声学)
纳米光子学
物理
复合材料
作者
Qing Zhang,Qiuyu Shang,Jia Shi,Jie Chen,Rui Wang,Yang Mi,Wenna Du,Chao Shen,Ren‐Min Ma,Xiaohui Qiu,Xinfeng Liu,Tze Chien Sum
出处
期刊:ACS Photonics
[American Chemical Society]
日期:2017-09-25
卷期号:4 (11): 2789-2796
被引量:30
标识
DOI:10.1021/acsphotonics.7b00757
摘要
Multicolor plasmonic nanowire lasers enable below diffraction-limit directional optical waveguiding and amplification vital to the development of next generation compact on-chip optical communications, super-resolution imaging, display technologies, and so on. However, progress in developing these compact lasers for different wavelengths is severely curtailed by the few complex fabrication methods available. In this work, we demonstrate wavelength-tunable plasmonic nanowire lasers by leveraging the intrinsic optical self-absorption of the gain medium. The plasmonic lasing wavelength is tunable from 465 to 491 nm by simply adjusting the nanowire length, that is, by approximately 76% over the interval width of the emission spectrum. The Purcell factor of plasmonic nanowire cavity decreases with increasing nanowire length; while the propagation loss increases from 1020 to 8354 cm–1 with decreasing nanowire diameter, exhibiting a plasmonic-photonic mode transition at diameters around 120–150 nm. Importantly, our findings advance the fundamental understanding and provide a new approach for engineering wavelength tunable plasmonic lasers.
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