NDLI: Photonic nanojets

Content Provider	IEEE Xplore Digital Library
Author	Zhigang Chen Taflove, A. Backman, V.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Eng., Northwestern Univ., Evanston, IL, USA (Zhigang Chen; Taflove, A.)
Abstract	We report what we believe to be the first evidence of localized photonic nanojets generated at the shadow-side surfaces of micron-scale, circular dielectric cylinders illuminated by a plane wave. Using high-resolution finite-difference time-domain (FDTD) numerical modeling, we have found that photonic nanojets have waists smaller than the diffraction limit and propagate over several optical wavelengths without significant diffraction. We have further found that such nanojets can enhance, by several orders of magnitude, the backscattering of visible light by nanometer-scale dielectric particles located within the nanojets. Not involving evanescent fields and not requiring mechanical scanning, photonic nanojets may provide a new means to detect and image nanoparticles of size well below the diffraction limit. This may provide a new ultramicroscopy technique for using visible light to detect and image nanoparticles, such as proteins, viral particles, and even single molecules; and to monitor molecular synthesis and aggregation processes of importance in many areas of biology, chemistry, material sciences, and tissue engineering.
Sponsorship	Univ. of California, Lawrence Livermore Nat. Lab. Northrop Grumman NSF ITT Industries ANSOFT
Starting Page	1923
Ending Page	1926
File Size	253339
Page Count	4
File Format	PDF
ISBN	0780383028
DOI	10.1109/APS.2004.1330579
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nanobioscience Optical surface waves Dielectrics Finite difference methods Time domain analysis Optical diffraction Nanoparticles Surface waves Engine cylinders Numerical models
Content Type	Text
Resource Type	Article

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