Nanorods with multidimensional optical information beyond the diffraction limit

Shihui Wen, Yongtao Liu, Fan Wang, Gungun Lin, Jiajia Zhou, Bingyang Shi, Yung Doug Suh, Dayong Jin*

*Corresponding author for this work

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Precise design and fabrication of heterogeneous nanostructures will enable nanoscale devices to integrate multiple desirable functionalities. But due to the diffraction limit (~200 nm), the optical uniformity and diversity within the heterogeneous functional nanostructures are hardly controlled and characterized. Here, we report a set of heterogeneous nanorods; each optically active section has its unique nonlinear response to donut-shaped illumination, so that one can discern each section with super-resolution. To achieve this, we first realize an approach of highly controlled epitaxial growth and produce a range of heterogeneous structures. Each section along the nanorod structure displays tunable upconversion emissions, in four optical dimensions, including color, lifetime, excitation wavelength, and power dependency. Moreover, we demonstrate a 210 nm single nanorod as an extremely small polychromatic light source for the on-demand generation of RGB photonic emissions. This work benchmarks our ability toward the full control of sub-diffraction-limit optical diversities of single heterogeneous nanoparticles.
Original languageEnglish
Article number6047
Pages (from-to)1-8
Number of pages8
JournalNature Communications
Publication statusPublished - 27 Nov 2020

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