[1] [1] E. Betzig, J. K. Trautman. Near-field optics: microscopy, spectroscopy, and surface modification beyond the diffraction limit. Science, 1992, 257(5067): 189～195

[2] [2] H. Heinzelmann, D. W. Pohl. Scanning near-field optical microscopy. Appl. Phys. (A), 1994, 59(1): 89～101

[3] [3] J. Radojewski, N. Sotnik, H. Pagnia. Tip technology for optical scanning tunneling microscopy and its influence on image quality. Int. J. Electron., 1994, 76(5): 973～980

[4] [4] D. Marcuse. Loss analysis of single-mode fiber splices. Bell Syst. Tech. J., 1977, 56(5): 703～718

[6] [6] C. W. Barnard, J. W. Y. Lit. Mode transforming properties of tapered single-mode fiber microlenses. Appl. Opt., 1993, 32(12): 2090～2094