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.
Demming
F
F
Lasercentre FH Münster, Stegerwaldstr. 39, 48565 Steinfurt, Germany. laserlab@fh-muenster.de
Jersch
J
J
Klein
S
S
Dickmann
K
K
D055590:Electromagnetic Phenomena; D020527:Microscopy, Scanning Probe / Q000295:instrumentation*; D055095:Optics and Photonics