期刊
ACS PHOTONICS
卷 6, 期 6, 页码 1416-1424出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b01763
关键词
zinc oxide nanorod; waveguiding; deep-trap emission; coherent anti-Stokes Raman scattering; polarization; scanning offset-emission hyperspectral microscopy
类别
资金
- National Science Foundation from the Chemical, Bioengineering, Environmental and Transport Systems Division under the Directorate for Engineering [CBET1841373]
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.
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