等离子体子
连贯性(哲学赌博策略)
激光阈值
激光器
光学
相干长度
材料科学
光电子学
纳米尺度
皮秒
相干时间
毫米
干涉测量
物理
纳米技术
凝聚态物理
超导电性
量子力学
作者
Thang B. Hoang,Gleb M. Akselrod,Ankun Yang,Teri W. Odom,Maiken H. Mikkelsen
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-10-04
卷期号:17 (11): 6690-6695
被引量:39
标识
DOI:10.1021/acs.nanolett.7b02677
摘要
Coherent light sources have been demonstrated based on a wide range of nanostructures, however, little effort has been devoted to probing their underlying coherence properties. Here, we report long-range spatial coherence of lattice plasmon lasers constructed from a periodic array of gold nanoparticles and a liquid gain medium at room temperature. By combining spatial and temporal interferometry, we demonstrate millimeter-scale (∼1 mm) spatial coherence and picosecond (∼2 ps) temporal coherence. The long-range spatial coherence occurs even without the presence of strong coupling with the lattice plasmon mode extending over macroscopic distances in the lasing regime. This plasmonic lasing system thus provides a platform for understanding the emergence of long-range coherence from collections of nanoscale resonators and points toward novel types of distributed lasing sources.
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