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Wang CY, Chen HY, Sun L, et al. Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics. Nat Commun. 2015;6:7734doi: 10.1038/ncomms8734.
Wang, C. Y., Chen, H. Y., Sun, L., Chen, W. L., Chang, Y. M., Ahn, H., Li, X., & Gwo, S. (2015). Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics. Nature communications, 67734. https://doi.org/10.1038/ncomms8734
Wang, Chun-Yuan, et al. "Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics." Nature communications vol. 6 (2015): 7734. doi: https://doi.org/10.1038/ncomms8734
Wang CY, Chen HY, Sun L, Chen WL, Chang YM, Ahn H, Li X, Gwo S. Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics. Nat Commun. 2015 Jul 15;6:7734. doi: 10.1038/ncomms8734. PMID: 26174058; PMCID: PMC4518272.
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Nat Commun. 2015 Jul 15;6:7734. doi: 10.1038/ncomms8734.

Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics.

Nature communications

Chun-Yuan Wang, Hung-Ying Chen, Liuyang Sun, Wei-Liang Chen, Yu-Ming Chang, Hyeyoung Ahn, Xiaoqin Li, Shangjr Gwo

Affiliations

  1. Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan.
  2. Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.
  3. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
  4. Department of Photonics, National Chiao-Tung University, Hsinchu 30010, Taiwan.
  5. 1] Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan. [2] National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.

PMID: 26174058 PMCID: PMC4518272 DOI: 10.1038/ncomms8734

Abstract

The development of ultrasmooth, macroscopic-sized silver (Ag) crystals exhibiting reduced losses is critical to fully characterize the ultimate performance of Ag as a plasmonic material, and to enable cascaded and integrated plasmonic devices. Here we demonstrate the growth of single-crystal Ag plates with millimetre lateral sizes for linear and nonlinear plasmonic applications. Using these Ag crystals, surface plasmon polariton propagation lengths beyond 100 μm in the red wavelength region are measured. These lengths exceed the predicted values using the widely cited Johnson and Christy data. Furthermore, they allow the fabrication of highly reproducible plasmonic nanostructures by focused ion beam milling. We have designed and fabricated double-resonant nanogroove arrays using these crystals for spatially uniform and spectrally tunable second-harmonic generation. In conventional 'hot-spot'-based nonlinear processes such as surface-enhanced Raman scattering and second-harmonic generation, strong enhancement can only occur in random, localized regions. In contrast, our approach enables uniform nonlinear signal generation over a large area.

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