CAJ | 학술논문

应用边界元方法分析了表面等离子体纳米腔的光学特性.设计了两种结构的亚波长金属纳米腔,一种是由上下两片相对放置的有限厚的银板构成,并且在内边界上刻蚀了正弦周期结构;另外一种是在前一种的基础上,在内边界的中间刻蚀了直线缺陷结构.研究了光通过这两种结构的共振谱线.数值结果表明,随着正弦周期数的增加,共振波峰的数日也在增加.并且,当以共振波长入射时,腔内的场强相对入射场强提高了五六倍.当在纳米腔的中间引入缺陷时,束缚在纳米腔中的光场强度相对于中间没有缺陷结构时的光场强度要强.这一研究可对设计新型超小激光光源提供非常重要的数据.
응용변계원방법분석료표면등리자체납미강적광학특성.설계료량충결구적아파장금속납미강,일충시유상하량편상대방치적유한후적은판구성,병차재내변계상각식료정현주기결구;령외일충시재전일충적기출상,재내변계적중간각식료직선결함결구.연구료광통과저량충결구적공진보선.수치결과표명,수착정현주기수적증가,공진파봉적수일야재증가.병차,당이공진파장입사시,강내적장강상대입사장강제고료오륙배.당재납미강적중간인입결함시,속박재납미강중적광장강도상대우중간몰유결함결구시적광장강도요강.저일연구가대설계신형초소격광광원제공비상중요적수거.
The opticl properties of surface plasmon polaritons nanocavities by boundary element method(BEM)is investigated.The resonant transmission spectrum of light is analyzed through a sub-wavelength metallic nanocavity composed by two pieces of finite silver thin slabs with nanometer configurations of periodic sinusoid profile on their inner boundary,setting by face-to-face arrangement with a separated spacing,and the central part is designed as a defect or non.defect structure.Two cases are analyzed.one is the nanocavity with all periodic sinusoid configurations on the inner side of the cavity and the other is the cavity with disfigurement in the central part.The numerical results show that the number of the resonant wavelengths increases as the number of sinusoid periodicity is increased.The field intensity is enhanced up to six times of its incident light field at resonant wavelength.When the disfigurement in the central part of nanocavity is introduced,the optical field intensity confined in the nanocavity is enhanced much more than that of the case of non-defect.The presentation provides very important information for designing novel nanolaser.