A surface plasmon resonance biosensor based on gold nanoparticle array
| Autor: | Dongmei Li, Lina Shi, Meihua Hong, Ming Liu, Yuchan Du, Hailiang Li |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
business.industry Nanoparticle Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Wavelength Spectral sensitivity Optics Electrical and Electronic Engineering Physical and Theoretical Chemistry business Biosensor Quartz Refractive index Visible spectrum Localized surface plasmon |
| Zdroj: | Optics Communications. :232-236 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2013.02.024 |
| Popis: | Using the finite-difference time-domain (FDTD) method, optical properties are investigated for a sensor comprising a two-dimensional array of gold cubes placed on quartz pillars on a quartz substrate. Background condition is analyzed for an approximate ideal collective resonance. It is found that the resonance intensity is mainly determined by the quartz etch depth, and the spectra valley position depends mainly on the lattice period. Thickness of the gold film affects the wavelength of the transmission spectra slightly, which gives a low processing tolerance requirement for fabrication. Sensitivity of the biosensor is also discussed, spectral sensitivity as high as 596.7 nm/refractive index unit (RIU) is obtained in the visible light region, making it an excellent candidate for liquid detection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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