Abstract
In conventional surface plasmon resonance (SPR) sensors, a single metal layer is commonly used, but the resolution is limited because of broad resonances. In metal-insulator-metal (MIM) structures, coupling between surface plasmon polaritons (SPP) propagating at different interfaces can be achieved and a sharp resonance can be expected. Attempts have been made by a Korean group [1] to improve the resolution using MIM structures. However, their structures are not very easy to fabricate.
© 2014 Japan Society of Applied Physics, Optical Society of America
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