南京邮电大学学报（自然科学版）2018，Vol.38Issue(2)：64-68,5.DOI:10.14132/j.cnki.1673-5439.2018.02.011
用半圆凹槽结构制备聚束的表面等离子体
Generating bunched surface plasmon polaritons by concentric semicircle grooves
摘要
Abstract
Bunched surface plasmon polaritons (SPPs) are obtained by the structure combined by the excitation source and concentric semicircle grooves in the gold film.The bunched SPPs can propagate along the symmetric axis of the concentric semicircle grooves with a small divergence angle for several micrometers.The semicircle groove can reflect the SPPs as a concave mirror,and the reflected SPPs form the enhanced or attenuated field around the symmetric axis according to the phase difference.The electric field of the SPPs is evaluated by the finite element method.The intensity distribution and the propagation length of the SPPs are analyzed considering the effects on the excitation polarization and the position.The full width of half maximum (FWHM) of the bunched SPPs is given in functions of the excitation position and the excitation wavelength,respectively.By manipulating the excitation polarization,excitation position,excitation wavelength and so on,a strongly bunched SPPs with a small divergence angle can be obtained,thus it plays a key role in increasing the integration of the integrated optics.关键词
表面等离子体/集成光学/发散角/半高全宽Key words
surface plasmon polaritons/integrated optics/divergence angle/full width of half maximum (FWHM)分类
信息技术与安全科学引用本文复制引用
刘爱萍,何文..用半圆凹槽结构制备聚束的表面等离子体[J].南京邮电大学学报（自然科学版）,2018,38(2):64-68,5.基金项目
国家自然科学基金(11504183)和南京邮电大学校级科研基金(NY214142)资助项目 （11504183）
