CST – Computer Simulation Technology

Cloaked Near-Field Scanning Optical Microscope Tip for Noninvasive Near-Field Imaging

Title:
Cloaked Near-Field Scanning Optical Microscope Tip for Noninvasive Near-Field Imaging
Author(s):
Andrea Alu, Nader Engheta
Source:
PHYSICAL REVIEW LETTERS
Vol./Issue/Date:
Volume: 105, Issue: 26, 31 Dec. 2010
Year:
2010
Page(s):
263906-1 - 263906-4
Abstract:
Near-field imaging is a well-established technique in biomedical measurements, since closer to the detail of interest it is possible to resolve subwavelength details otherwise unresolved by regular lenses. A near-field scanning optical microscope (NSOM) tip may indeed overcome the resolution limits of far-field optics, but its proximity inherently perturbs the measurement. Here, we apply the recent concept of a ‘‘cloaked sensor’’ to an NSOM device in collection mode, showing theoretically how a proper plasmonic cover applied to an NSOM tip may drastically improve its overall measurement apabilities.
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