Coaxial scanning near-field optical microscope tips: an alternative for conventional tips with high transmission efficiency?
Since the development of the first scanning near-field optical microscope, great effort has been put into the development of near-field optical probe tips with a good lateral resolution of the order of several tens of nanometres and a high power throughput. Several groups have proposed the use of scanning near-field optical tips with a coaxial structure. From electromagnetic theory, it is known that such structures have no cut-off frequency and a power transmission close to unity. In this paper we discuss some topics concerning the stimulation of optical coaxial waves and their propagation behaviour.
Lasercentre FH Münster, Stegerwaldstr. 39, 48565 Steinfurt, Germany. laserlab@fh-muenster.de
F
F
Demming
J
J
Jersch
S
S
Klein
K
K
Dickmann
D055590:Electromagnetic Phenomena; D020527:Microscopy, Scanning Probe / Q000295:instrumentation*; D055095:Optics and Photonics