Position- and Polarization-Specific Waveguiding of Multi-Emissions in Single ZnO Nanorods
Position- and Polarization-Specific Waveguiding of Multi-Emissions in Single ZnO Nanorods
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DOI：
10.1021/acsphotonics.8b01763
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发表时间：
2019-06-01
期刊：
影响因子：
7
通讯作者：
Lee, Young Jong
中科院分区：
文献类型：
--
作者：
Chon, Bonghwan;Truong, Johnson;Lee, Young Jong
我们研究多光子产生的光信号通过单一的ZnO纳米棒（NR）波导使用一种新开发的，扫描偏置发射高光谱显微镜（SOHM）技术。具体来说，我们同时分析波导行为的和频产生（SFG），深陷阱发射（DTE），和相干反斯托克斯拉曼散射（汽车）发生在个别氧化锌NR。SOHM获取波导光强度的光谱索引和空间分辨强度图/光谱，同时扫描激发/发射收集位置和光偏振。因此，SOHM强大的测量能力使定量分析特定于多光子产生的发射的不同ZnO NR波导行为成为测量位置、光-物质相互作用几何形状和引导信号的光学起源的函数。随后，我们揭示了不同的波导行为的单氧化锌NR有关的SFG，DTE，和CARS起源的信号，并讨论特别有吸引力的ZnO NR性能在汽车波导。
We examine multiphoton-produced optical signals waveguided through single ZnO nanorods (NRs) using a newly developed, scanning offset-emission hyperspectral microscopy (SOHM) technique. Specifically, we concurrently analyze waveguiding behaviors of sum-frequency generation (SFG), deep-trap emissions (DTE), and coherent anti-Stokes Raman scattering (CARS) occurring in individual ZnO NRs. SOHM acquires spectrally indexed and spatially resolved intensity maps/spectra of waveguided light intensity, while excitation/emission collection positions and light polarization are scanned. Hence, the powerful measurement capabilities of SOHM enable quantitative analyses of the different ZnO NR waveguiding behaviors specific to the multiphoton-generated emissions as a function of measurement position, light-matter interaction geometry, and the optical origin of the guided signal. We subsequently reveal the distinct waveguiding behaviors of single ZnO NRs pertaining to the SFG-, DTE-, and CARS-originated signals and discuss particularly attractive ZnO NR properties in CARS waveguiding.