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Nanowires Proximity Featured with Angular Forgiveness and Far-Reaching Hotspots toward Surface-Enhanced Raman
Jemin Lee1, Keunhan Park2, Hyung Gyu Park1
1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea.
ACS Omega
|August 14, 2026
Summary
Numerical simulations reveal how crossing plasmonic nanowires create hotspots for enhanced Raman scattering (SERS). This understanding aids in designing superior SERS substrates by optimizing electric-field enhancement.
Area of Science:
- Nanotechnology
- Plasmonics
- Chemical Sensing
Background:
- Surface-enhanced Raman spectroscopy (SERS) relies on localized hotspots for strong plasmon resonance.
- Randomly entangled plasmonic nanowires exhibit superior SERS performance.
- The mechanism behind this enhancement, particularly electric-field distribution, requires further investigation.
Purpose of the Study:
- To numerically simulate and characterize electric-field enhancement around nanowire dimers.
- To elucidate the angular forgiveness effect in crossing-nanowire architectures.
- To provide insights for designing effective SERS substrates.
Main Methods:
- Numerical simulations of electric-field enhancement.
- Analysis of nanowire dimer configurations at various angular orientations.
- Characterization of plasmonic field enhancement.
Main Results:
- Detailed mapping of electric-field enhancement around nanowire dimers.
- Quantification of the angular forgiveness effect on field enhancement.
- Demonstration of strong, far-reaching field enhancement in crossing-nanowire structures.
Conclusions:
- The angular forgiveness mechanism in crossing-nanowire architectures significantly contributes to SERS performance.
- Understanding electric-field enhancement is crucial for optimizing SERS substrate design.
- This study provides a pathway for developing advanced plasmonic nanostructures for chemical sensing.
