Tunable SERS from aluminium nanohole arrays in the ultraviolet region

Abstract

Ordered Al nanohole arrays for tunable UV-SERS are theoretically proposed and simulated by using FDTD method. The properly designed Al nanohole arrays produce stable and predictable Raman enhancement under the deep UV laser illumination. The SERS enhancement factor as high as 5 to 6 orders of magnitude is attained in the optimal geometry. The correlation between the SERS and EOT is studied in detail.