• Home
  • Search Results
  • Giant colloidal silver crystals for low-loss linear and nonlinear plasmonics.

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

Nature communications (2015-07-16)
Chun-Yuan Wang, Hung-Ying Chen, Liuyang Sun, Wei-Liang Chen, Yu-Ming Chang, Hyeyoung Ahn, Xiaoqin Li, Shangjr Gwo
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Hydrogen peroxide solution, 30 % (w/w) in H2O, contains stabilizer
Sigma-Aldrich
Ethylene glycol, anhydrous, 99.8%
Sigma-Aldrich
Chloroplatinic acid hydrate, ≥99.9% trace metals basis
Sigma-Aldrich
Hydrogen peroxide solution, 34.5-36.5%
Sigma-Aldrich
Ethylene glycol, BioUltra, ≥99.5% (GC)
Sigma-Aldrich
Chloroplatinic acid hydrate, ~38% Pt basis
Sigma-Aldrich
Hydrogen peroxide solution, contains potassium stannate as inhibitor, 30-32 wt. % in water, semiconductor grade, 99.999% trace metals basis
Sigma-Aldrich
Chloroplatinic acid hydrate, 99.995% trace metals basis
Sigma-Aldrich
Ethylene glycol 5 M solution
Supelco
Ethylene glycol solution, NMR reference standard, 80% in DMSO-d6 (99.9 atom % D), NMR tube size 5 mm × 8 in.
Supelco
Ethylene glycol solution, NMR reference standard, 80% in DMSO-d6 (99.9 atom % D), NMR tube size 3 mm × 8 in.