Abstract
To enhance Raman scattering, we propose a multi-layer substrate which behaves similar to a magnetic mirror or what is also known as high-impedance surface (HIS). Due to this property, the electric field of the illuminating light is increased by a factor of two. This field enhancement doubles the amplitude of the Raman signal generated by the molecules residing on this multi-layer structure. On the other hand, the introduced multi-layer structure is designed to operate as a filter for the scattered field at the Rayleigh wavelength, so that the wave transmitted through this structure mainly contains the Raman signal with 45 dB rejection of the Rayleigh wavelength. The designed substrate reduces the complexity of the conventional Raman setup and helps to realize a more compact setup.
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