Journal
APPLIED PHYSICS LETTERS
Volume 83, Issue 1, Pages 6-8Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1590737
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Scanning near-field optical microscopy is a powerful technique offering subdiffraction-limit optical resolution. However, the range of applications is limited by slow image acquisition rates. In this letter we demonstrate an implementation of a near-field optical microscope capable of scan speeds of 150 mm/s producing images of an area 20 mum(2) in less than 10 ms, i.e., over 100 frames/s. To achieve this, a method of measuring the optical near-field intensity with a high bandwidth of greater than 1 MHz has been developed. A second original aspect is that the scan system uses a mechanical resonance of the probe to address the sample. The presented microscope is over 1000 times faster than a conventional scanning near-field optical microscope and similar to10 times faster than any scanning probe microscope to date. (C) 2003 American Institute of Physics.
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