Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2005-01-20

Journal: 光学技术

Included Journals: CSCD、ISTIC、PKU

Volume: 31

Issue: 1

Page Number: 62-64,68

ISSN: 1002-1582

Key Words: PSTM;FDTD;成像;分辨率

Abstract: 尝试用时域有限差分法(FDTD)分析采用不同探针时光子扫描隧道显微镜(PSTM)成像的分辨率和效率.对四种探针,即不镀膜,带菱形金尖,镀金膜有孔径,镀金膜无孔径的探针,用二维p极化波,满足全反射条件,并用样品台上方平行于界面的隐失波作为等效入射波源,用探针距离尖顶一定高度截面的玻印亭矢量计算散射场强.数值模拟结果表明,带纳米尺度金尖的探针具有最好成像的分辨率和效率,镀膜无孔径和镀膜孔径探针次之,不镀膜探针最差.