Sum-Frequency Generation Spectra of Thin Organic Films on Silver Enhanced Due to Surface Plasmon Excitation

Nobel metal nanohole arrays have been used extensively in chemical and biological systems due to their fascinating optical properties. Gold nanohole arrays (Au NHAs) were prepared as surface plasmon polaritons (SPP) generators for the surface-enhanced sum-frequency generation (SFG) detection of 4-Mercaptobenzonitrile (4-MBN). The angle-resolved reflectance spectra revealed that the Au NHAs have three angle-dependent SPP modes and two non-dispersive localized surface plasmon resonance (LSPR) modes under different structural orientation angles (sample surface orientation). An enhancement factor of ~30 was achieved when the SPP and LSPR modes of the Au NHAs were tuned to match the incident visible (VIS) and output SFG, respectively. This multi-mode matching strategy provided flexible controls and selective spectral windows for surface-enhanced measurements, and was especially useful in nonlinear spectroscopy where more than one light beam involved. The structural orientation- and power-dependent performance demonstrated the potential of plasmonic NHAs in SFG and other nonlinear sensing applications, and provided a promising surface molecular analysis development platform.

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Study of Adsorbates on a Silver Surface by Sum-Frequency Generation with Surface Plasmon Waves

Laser Spectroscopy VIII - Springer Series in Optical Sciences ◽

10.1007/978-3-540-47973-4_75 ◽

1987 ◽

pp. 260-261

Author(s):

Z. Chen ◽

Y. J. Liu ◽

J. B. Zheng ◽

Z. U. Zhang

Keyword(s):

Surface Plasmon ◽

Sum Frequency Generation ◽

Silver Surface ◽

Sum Frequency ◽

Frequency Generation ◽

Surface Plasmon Waves

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Plasmonic Gold Nanohole Arrays for Surface-Enhanced Sum Frequency Generation Detection

Nanomaterials ◽

10.3390/nano10122557 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2557

Author(s):

Wei Guo ◽

Bowen Liu ◽

Yuhan He ◽

Enming You ◽

Yongyan Zhang ◽

...

Keyword(s):

Surface Plasmon ◽

Nonlinear Spectroscopy ◽

Sum Frequency Generation ◽

Localized Surface Plasmon ◽

Sum Frequency ◽

Structural Orientation ◽

Sensing Applications ◽

Surface Enhanced ◽

Nanohole Arrays ◽

Frequency Generation

Nobel metal nanohole arrays have been used extensively in chemical and biological systems because of their fascinating optical properties. Gold nanohole arrays (Au NHAs) were prepared as surface plasmon polariton (SPP) generators for the surface-enhanced sum-frequency generation (SFG) detection of 4-Mercaptobenzonitrile (4-MBN). The angle-resolved reflectance spectra revealed that the Au NHAs have three angle-dependent SPP modes and two non-dispersive localized surface plasmon resonance (LSPR) modes under different structural orientation angles (sample surface orientation). An enhancement factor of ~30 was achieved when the SPP and LSPR modes of the Au NHAs were tuned to match the incident visible (VIS) and output SFG, respectively. This multi-mode matching strategy provided flexible controls and selective spectral windows for surface-enhanced measurements, and was especially useful in nonlinear spectroscopy where more than one light beam was involved. The structural orientation- and power-dependent performance demonstrated the potential of plasmonic NHAs in SFG and other nonlinear sensing applications, and provided a promising surface molecular analysis development platform.

Download Full-text