| 摘要 |
<p>A supersensitive Raman scattering near-field enhanced sample cell includes two parallel substrates, both of which are transparent and have an index of refraction greater than that of the sample. The substrates' inner surface is plated by silver or gold film with the thickness of several nanometers in which silver or gold colloidal solids in the size of nanometer or nano-structures are arranged. The two boundary surfaces of said cell, between which are filled with the sample, can be clamped to a space with the distance of several ten to several hundred nanometers, to permit the laser exciting beam, having an incident angle exceeding the critical angle thereof, to produce evanescent wave, which in turn excites the sample and make it exit Raman scattering in the main form of evanescent wave. The application also relates to a Raman scattering near-field enhanced method.</p> |
