TY - GEN
T1 - Estimating the effective optical aperture of a tapered fiber probe in PSTM imaging
AU - Tsai, D. P.
AU - Wang, Z.
AU - Moskovits, M.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.
PY - 1993/1
Y1 - 1993/1
N2 - The effective amplitude of the interference pattern produced by sending a laser beam back upon itself in a BK-7 glass prism was measured in the evanescent wave region outside the prism using a tapered fiber tip scanned and retracted piezoelectrically. This effective amplitude was related to an effective aperture size of the fiber by assuming that the finite size of the fiber averaged the optical signal over a Gaussian distribution. In this way the size of the smallest feature resolvable by the photon scanning tunnelling microscope was determined operationally. The consistency of the aperture value obtained was affirmed by repeating the measurement with various laser wavelengths. The relationship between the measured effective optical aperture size and the dimensions of the fiber tip as determined by electron microscopy are discussed.
AB - The effective amplitude of the interference pattern produced by sending a laser beam back upon itself in a BK-7 glass prism was measured in the evanescent wave region outside the prism using a tapered fiber tip scanned and retracted piezoelectrically. This effective amplitude was related to an effective aperture size of the fiber by assuming that the finite size of the fiber averaged the optical signal over a Gaussian distribution. In this way the size of the smallest feature resolvable by the photon scanning tunnelling microscope was determined operationally. The consistency of the aperture value obtained was affirmed by repeating the measurement with various laser wavelengths. The relationship between the measured effective optical aperture size and the dimensions of the fiber tip as determined by electron microscopy are discussed.
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U2 - 10.1117/12.168953
DO - 10.1117/12.168953
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 0819410810
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 93
EP - 104
BT - Scanning Probe Microscopies II
A2 - Williams, Clayton C.
T2 - Optics, Electro-Optics, and Laser Applications in Science and Engineering 1993 (OE/LASE'93)
Y2 - 17 January 1993 through 22 January 1993
ER -