Metal nano-gap photonic crystals for enhanced Raman spectroscopy

摘要

Planar optical platform for generating a Raman signal from a foreign object is provided and optically coupled to the plasmonic band structure region and the output region and the input region for extracting received optical radiation. Comprises a layer of a first material having a patterned array of small regions of the second material having a second refractive index, the refractive index of the first plasmon band structure region, the side walls of the small area of ​​each It is coated with a metal dielectric layer. The array of small area, resulting plasmon band structure, in use, confining the plasmon resonance excited by the optical radiation coupled to the plasmonic band structure region, the plasmon resonance, each small area is, the plasmon band structure region producing a Raman signal from a foreign object which is located in close proximity. Well, the platform is particularly useful in surface-enhanced Raman spectroscopy of the analyte molecules may be incorporated in the spectroscopy system. [Selection Figure Figure 2