【摘要】：提出并研究基于圓角矩形結(jié)構(gòu)的表面等離子體激元帶通濾波器,運(yùn)用時(shí)域有限差分方法(Finite-Difference Time-Domain,FDTD)對(duì)濾波器的透過率特性進(jìn)行模擬仿真.由于采用圓角矩形結(jié)構(gòu),濾波器的透過率在帶寬不變的情況下被優(yōu)化.通過改變圓角矩形諧振腔的圓角半徑以及腔長,可以實(shí)現(xiàn)所需要的透過率光譜.在圓角矩形結(jié)構(gòu)基礎(chǔ)上提出1×2解復(fù)用器,通過將輸出端2與諧振腔耦合處的波導(dǎo)增長120 nm,實(shí)現(xiàn)了抑制共振模作用.通過在濾波器的圓角矩形諧振腔中注入具有雙折射效應(yīng)的液晶Merck BL009,提出具有波長選擇作用的光開關(guān).結(jié)果表明,基于圓角矩形結(jié)構(gòu)的等離子體激元濾波器在納米光學(xué)器件中具有很好的應(yīng)用前景.
[Abstract]:A surface plasmon band-pass filter based on rounded rectangular structure is proposed and studied. The transmission characteristics of the filter are simulated by using time-domain finite difference method (Finite-Difference Time-Domain,FDTD). Due to the rectangular fillet structure, the transmittance of the filter is optimized under the condition of constant bandwidth. The required transmittance spectrum can be achieved by changing the fillet radius and cavity length of the fillet rectangular resonator. A 1 脳 2 demultiplexer is proposed on the basis of a circular rectangular structure. The resonant mode is suppressed by increasing the waveguide growth at the coupling of the output 2 and the resonant cavity by 120 nm,. A wavelength selective optical switch is proposed by injecting liquid crystal Merck BL009, with birefringence into the fillet rectangular cavity of the filter. The results show that the plasma exciton filter based on circular-fillet rectangular structure has a good application prospect in nano-optical devices.
【作者單位】： 華南師范大學(xué)信息光電子科技學(xué)院廣東省微納光子功能材料與器件重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(61275059,61307062)
【分類號(hào)】：TN713
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本文編號(hào)：2446329