Low-threshold supercontinuum generation in semiconductor nanoribbons by continuous-wave pumping
Low-threshold supercontinuum generation in semiconductor nanoribbons by continuous-wave pumping
复制标题
通过连续波泵浦在半导体纳米带中产生低阈值超连续谱
DOI：
10.1364/oe.20.008667
复制
发表时间：
2012-04-09
期刊：
影响因子：
3.8
通讯作者：
Tong, Limin
中科院分区：
文献类型：
--
作者：
Gu, Fuxing;Yu, Huakang;Tong, Limin
我们报告的第一个观察到的超连续谱（SC）产生在单个半导体纳米带（NR）。通过发射连续波（CW）532-nm泵浦光沿着200 μ m长的CdS NR用于波导激发，实现了SC产生，其阈值低至亚毫瓦级，与先前的CW泵浦在玻璃纤维中产生的SC相比，其近似低3个数量级。低阈值得益于良好的材料特性和波导几何结构，包括高拉曼增益、强光限制、更多的导模和声子模。我们的工作为低阈值纳米SC源铺平了道路，并可能发现从光谱分析和生物成像到材料研究的广泛应用。(C)2012美国光学学会
We report the first observation of supercontinuum (SC) generation in single semiconductor nanoribbons (NRs). By launching a continuous wave (CW) 532-nm pump light along a 200-mu m-length CdS NR for waveguiding excitation, SC generation is realized with a threshold down to sub-milliwatt level, which is similar to 3 orders lower compared with previous CW-pumped SC generated in glass fibers. The low threshold is benefitted from the favorable material properties and waveguide geometries including high Raman gains, strong light confinement, more optical guided modes and phonon modes. Our work paves the way to low-threshold nanoscale SC sources and may find widespread applications ranging from spectroscopic analysis and biological imaging to material research. (C) 2012 Optical Society of America