標題: Plasmonic Metasurfaces for Nonlinear Optics and Quantitative SERS
作者: Gwo, Shangjr
Wang, Chun-Yuan
Chen, Hung-Ying
Lin, Meng-Hsien
Sun, Liuyang
Li, Xiaoqin
Chen, Wei-Liang
Chang, Yu-Ming
Ahn, Hyeyoung
光電工程學系
Department of Photonics
關鍵字: plasmonics;metasurface;nonlinear optics;surface-enhanced Raman spectroscopy;silver;colloidal crystal;nanoparticle;self-assembly
公開日期: Aug-2016
摘要: Plasmonic metasurfaces consist of two-dimensional arrays of metallic nanoresonators (plasmonic "meta-atoms"), which exhibit collective and tunable resonance properties controlled by electromagnetic near-field coupling. These man-made surfaces can produce a range of unique optical properties unattainable with natural materials. In this review, we focus on the emerging applications of metasurfaces with precisely engineered plasmonic properties for nonlinear optics and surface-enhanced Raman spectroscopy (SERS). In practice, these applications are quite susceptible to material losses and structural imperfections, such as variations in size, shape, periodicity of meta-atoms, and their material states (crystallinity, impurity, and oxidation, etc.). In these aspects, conventional top-down lithographic techniques are facing major challenges due to inherent limitations in intrinsic material properties and material quality introduced during growth, synthesis, and fabrication processes, as well as achievable lithographic resolution. Moreover, they are prohibitively expensive and time-consuming for fabrication over large areas. Here, we show that colloidal silver crystals (millimeter-sized single-crystalline plates and thiolate-capped nanoparticles) synthesized by solution-based chemical methods are excellent material platforms for the fabrication of high-quality plasmonic metasurfaces. In, particular, both top-down (focused ion-beam milling) and bottom-up (centimeter-scale self-assembly) techniques can be exploited to generate uniform and precisely engineered colloidal metasurfaces for broadband tunable (across the full visible range) second-harmonic generation and quantitative SERS at the single-molecule level.
URI: http://dx.doi.org/10.1021/acsphotonics.6b00104
http://hdl.handle.net/11536/134116
ISSN: 2330-4022
DOI: 10.1021/acsphotonics.6b00104
期刊: ACS PHOTONICS
Volume: 3
Issue: 8
起始頁: 1371
結束頁: 1384
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