摘要
We proposed a horseshoe-shaped nanostructure formed by etching a gap on a ring structure.By numerical simulations,it was found that the local field of the structure was significantly enhanced compared with that of the traditional ring structure.Furthermore,an additional resonant peak appeared corresponding to the electric field coupling in the gap,and this resonant wavelength was able to be tuned significantly by the particle size,gap size,and gap position.Such properties make the structure promising in biomedical and sensing applications.
We proposed a horseshoe-shaped nanostructure formed by etching a gap on a ring structure.By numerical simulations,it was found that the local field of the structure was significantly enhanced compared with that of the traditional ring structure.Furthermore,an additional resonant peak appeared corresponding to the electric field coupling in the gap,and this resonant wavelength was able to be tuned significantly by the particle size,gap size,and gap position.Such properties make the structure promising in biomedical and sensing applications.
基金
supported by the National Natural Science Foundation of China under Grants No.61405012 and No.61420106014
National Basic Research Program of China(973 Program)under Grant No.2013CBA01702
Program for New Century Excellent Talents in University under Grant No.NCET-13-1008
