2001, Volume 3, Issue 8
Strategic Study of CAE >> 2001, Volume 3, Issue 8
The Method for Separating Image of the Bent Optical Fiber Tip Resonated AF/PSTM
Department of physics, Dalian University of Technology, Dalian, Liaoning 116023, China
Next Previous
Abstract
An invented patent about the method for separating image of Atom Force/Photon Scanning Tunneling Microscope (AF/PSTM) and its numerical simulation results are introduced. In AF/PSTM π-symmetry lighting beams were used for eliminating false image. The AF/PSTM bi-functional tip is made of bent optical fiber and works on constant amplitude resonance. △ICD and △ICI are AC information of photon tunnel of AF/PSTM under constant average distance (〓→A )scanning mode (constant amplitude mode) and constant average intensity scanning mode respectively. Both (△ICD/〓CD)2 and (△ICI)2 are approximately linear with refractive index (n1) of the sample. Results of the numerical simulation illustrate that the method for separating image of AF/PSTM is efficient. AF/PSTM constant average distance (〓→A ) scanning mode (constant amplitude mode) has more advantages than that of constant average intensity one, such as the better response sensitivity of refractive index of the sample, and ability of getting three images of transmisitivity, refractive index and morphology of sample simultaneously. Some excellencies of this method are listed at last.
Figures
图1
图2
图3
图4
References
[ 1 ] RedickRC , WarmackDW , FerrelTL , etal.Photonscanningtunnelingmicroscopy[J].RevSciInstrum, 1990, 61 (12) :3669～3677
[ 2 ] 吴世法, 姚骏恩, 简国树, 等.光子扫描隧道显微镜的进展[J].光学学报, 1998, 18 (2) :191～198 link1
[ 3 ] WuShifa.Photonscanningtunnelingmicroscopynowandinthefuture[J], Scanning, 1995, 17 (1) :18～22
[ 4 ] 吴世法.近代成像技术与图像处理[M ].北京:国防工业出版社, 1997.294～339
[ 5 ] WuShifa, JianGuoshu, PanShi.Howtoexplaintheimageofphotonscanningtunnelingmicroscope[J].SPIE , 1998, 3467:34～39
[ 6 ] 简国树, 潘 石, 王玉光.PSTM等强度扫描方式下减小假像的数值模拟[J].电子显微学报, 1999, 18 (1) :13～18 link1
[ 7 ] 王晓秋, 简国树, 吴世法, 等.多层系统周期样品PSTM消假像微扰近似[R].第六届全国扫描隧道显微学学术会议 (STM’6) , 厦门, 2000
京公网安备 11010502051620号
