CAJ | 학술논문

均匀平面波垂直入射于镀膜光纤探针，选用三维时域有限差分法（FDTD），比较了不同入射波长、不同出射孔径、不同锥角及不同金属膜厚度的近场分布情况。通过对各参量的计算与比较，结果表明，当波长越小、孔径越大、锥角越大和膜厚越大时，光纤探针尖端的出射光强越大、越集中，从而有利于近场操作的进行。
균균평면파수직입사우도막광섬탐침，선용삼유시역유한차분법（FDTD），비교료불동입사파장、불동출사공경、불동추각급불동금속막후도적근장분포정황。통과대각삼량적계산여비교，결과표명，당파장월소、공경월대、추각월대화막후월대시，광섬탐침첨단적출사광강월대、월집중，종이유리우근장조작적진행。
In the case of the uniform plane wave normally incidenting into the coated optical fiber probe, the 3D finite difference time domain （FDTD） is used for comparing the near-field distribution among the diffferent wavelength, aperture, taper angle and metallic film thickness. The results show that the light intensity in the top of the probe is stronger and more concentred when the wavelength is shorter, aperture is larger, both the taper angle and film thickness are larger, which is suitalbe for the near-field operation.