中国光学
中國光學
중국광학
CHINESE JOURNAL OF OPTICS
2011年
4期
363-368
,共6页
刘镜%刘娟%王涌天%谢敬辉
劉鏡%劉娟%王湧天%謝敬輝
류경%류연%왕용천%사경휘
亚波长金属光栅%表面等离子体激元%共振波长%边界元方法
亞波長金屬光柵%錶麵等離子體激元%共振波長%邊界元方法
아파장금속광책%표면등리자체격원%공진파장%변계원방법
sub-wavelength metallic gratings%Surface Polariton Plasma(SPP)%resonant wavelength%boundaryelement method
亚波长金属光栅在共振波长处有光场局域增强、异常透射等现象,为深入认识其共振机制,本文研究了亚波长金属光栅的表面等离子体激元(SPP)共振特性。通过研究不同金属光栅的几何结构以及金属介电常数对SPP共振波长的影响,获得了3种共振波长的基本物理机制。采用周期边界元法进行数值模拟,在边界积分方程的基础上结合平面波展开方法来处理任意形状的周期性结构。模拟结果表明,3种共振波长可以分别由金属的材料、金属光栅周期和金属光栅厚度所调谐。该研究为微纳米光学器件的设计提供了依据。
亞波長金屬光柵在共振波長處有光場跼域增彊、異常透射等現象,為深入認識其共振機製,本文研究瞭亞波長金屬光柵的錶麵等離子體激元(SPP)共振特性。通過研究不同金屬光柵的幾何結構以及金屬介電常數對SPP共振波長的影響,穫得瞭3種共振波長的基本物理機製。採用週期邊界元法進行數值模擬,在邊界積分方程的基礎上結閤平麵波展開方法來處理任意形狀的週期性結構。模擬結果錶明,3種共振波長可以分彆由金屬的材料、金屬光柵週期和金屬光柵厚度所調諧。該研究為微納米光學器件的設計提供瞭依據。
아파장금속광책재공진파장처유광장국역증강、이상투사등현상,위심입인식기공진궤제,본문연구료아파장금속광책적표면등리자체격원(SPP)공진특성。통과연구불동금속광책적궤하결구이급금속개전상수대SPP공진파장적영향,획득료3충공진파장적기본물리궤제。채용주기변계원법진행수치모의,재변계적분방정적기출상결합평면파전개방법래처리임의형상적주기성결구。모의결과표명,3충공진파장가이분별유금속적재료、금속광책주기화금속광책후도소조해。해연구위미납미광학기건적설계제공료의거。
Sub-wavelength metallic gratings have extraordinary transmission efficiency and local field enhancement in resonant wavelengths.In order to deeply understand the resonant discipline,the resonant origins of the sub-wavelength metallic gratings were investigated.Three resonant wavelengths were analyzed by adjusting the geometric parameters and materials of the gratings,and the physical disciplines of three different resonant wavelengths were obtained.In the simulation,the periodical boundary method based on the boundary integral equation combined with a plane wave expansion method was used to process the period structures with arbitrary shapes.The numerical results show that three resonant center wavelengths can be tuned by the materials,periods,and the thicknesses of the gratings.It is believed that this study will provide useful information for further designing micro-nano optical elements.