SPP-associated dual left-handed bands and field enhancement in metal-dielectric-metal metamaterial perforated by asymmetric cross hole arrays.
Dual-band left-handed transmissions in the near infrared frequencies through the metal-dielectric-metal metamaterial perforated with an array of asymmetric cross holes are demonstrated. It is shown that the left-handed bands originate from the SPP-associated magnetic response excited by different polarized light and their frequencies can be tuned by the arm's length or width of the cross-gaps. The structures are further optimized at 1.064 microm laser light excitation for elucidating the mechanism and possible application in surface enhanced Raman spectroscopy in sandwiched architectures. This study provides valuable information for the design of compact optical devices with dual left-handed bands in a single structure and may also pave the way toward stable and reproducible substrate design for surface enhanced Raman spectroscopy.
Ding
P
P
School of Physical Science & Engineering, Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China.
Liang
E J
EJ
Hu
W Q
WQ
Zhou
Q
Q
Zhang
L
L
Yuan
Y X
YX
Xue
Q Z
QZ
D003198:Computer Simulation; D008027:Light; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical; D016062:Porosity; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
D008670:Metals