本論文是探討掃瞄式近場光學顯微儀在非輻射場的產生和檢測上的基礎理論,它能夠以超繞射極限的分辨率進行成像,本文採用時域有限差分(FDTD)方法模擬,近場激發有高空間解析度與寬廣的波向量,可以在波導口激發出表面電漿波,模擬結果發現圓孔和金屬膜探針的近場分佈相似外,並比較裸光纖探針及鍍金屬膜探針間的差異,以提出探針在製備上作為改良之參考與建議。
The subwavelength resolution of near field scanning optical microscopes (NSOM) is based upon the detection of the static radiation in near field. No diffraction effect happens enable the NSOM to have ultrahigh resolution in imaging. In this paper, the behavior of near-field distribution and surface plasmom effects in fiber-optic probes is investigated numerically by using finite-difference time domain(FDTD). Results of the calculations provide a direct theoretical basis for probe optimization.