Journal
OPTICS EXPRESS
Volume 19, Issue 14, Pages 13150-13157Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.013150
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Funding
- U.S-Israel binational science foundation
- Israeli Science Foundation
- Israeli Ministry of Science and Technology
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The capability to focus electromagnetic energy at the nanoscale plays an important role in nanoscinece and nanotechnology. It allows enhancing light matter interactions at the nanoscale with applications related to nonlinear optics, light emission and light detection. It may also be used for enhancing resolution in microscopy, lithography and optical storage systems. Hereby we propose and experimentally demonstrate the nanoscale focusing of surface plasmons by constructing an integrated plasmonic/photonic on chip nanofocusing device in silicon platform. The device was tested directly by measuring the optical intensity along it using a near-field microscope. We found an order of magnitude enhancement of the intensity at the tip's apex. The spot size is estimated to be 50 nm. The demonstrated device may be used as a building block for lab on a chip systems and for enhancing light matter interactions at the apex of the tip. (C)2011 Optical Society of America
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