Abstract
Raman enhancement in a couple of nanocylinders (one made of silicon and one made of silver) has been calculated in our work. A formulation for enhanced Raman scattering of semiconductor cylinders is presented. The numerical calculation result based on the formulation indicates that the couple of nanocylinders (one made of silicon and one made of silver) can enhance the electric field in the silicon cylinder greatly and shows strong enhancement for volume average compared with bulk silicon. The largest enhancements per unit volume approach 107 times as compared with bulk crystalline silicon. The silicon and silver nanocylinder structures can combine useful features of the resonant excitations of silicon cylinder and the effect of resonant interaction between silicon cylinder and silver cylinder. This leads to the giant enhancement in the field inside the silicon cylinder and hence an increased Raman scattering. Moreover the results indicate that the interaction between the silicon cylinder and the silver cylinder is very strong under proper conditions.
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