Author/Authors :
Billot، نويسنده , , L. and Lamy de la Chapelle، نويسنده , , M. and Grimault، نويسنده , , A.-S. and Vial، نويسنده , , A. and Barchiesi، نويسنده , , D. and Bijeon، نويسنده , , J.-L. and Adam، نويسنده , , P.-M. and Royer، نويسنده , , P.، نويسنده ,
Abstract :
The SERS efficiency of gold nanowires arrays elaborated by electron beam lithography and lift-off technique efficiency is investigated by depositing a molecular probe (BPE) trans-1,2-bis(4-pyridyl)ethylen on the arrays and using an excitation wavelength of 632.8 nm. The observation of the dependence of the Raman enhancement versus the nanowire length is clearly demonstrated and remarkably a maximum enhancement is observed. For such arrays, we also show clearly that odd multipolar localised surface plasmon modes (up to seventh-order) exhibits a stronger efficiency than the first dipolar order in SERS process.
