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7 Mar 2005

Volume 86, Issue 10, Articles (10xxxx)

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Appl. Phys. Lett. 86, 103102 (2005); http://dx.doi.org/10.1063/1.1875734 (3 pages)

Tadashi Kawazoe, Kiyoshi Kobayashi, and Motoichi Ohtsu
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Effects of body forces on electro- and magnetorheological fluids

D. J. Klingenberg, J. C. Ulicny, and A. Smith

Appl. Phys. Lett. 86, 104101 (2005); http://dx.doi.org/10.1063/1.1866224 (3 pages) | Cited 6 times

Online Publication Date: 1 March 2005

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Body forces in electro- and magnetorheological fluids are typically small compared to the magnitudes of the field-induced electric and magnetic forces. Using particle-level simulations, we show that these relatively small forces can have large effects on the rheological response of these fluids in shear flow.
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83.80.Gv Electro- and magnetorheological fluids
83.50.Ax Steady shear flows, viscometric flow
83.60.Np Effects of electric and magnetic fields
83.10.Pp Particle dynamics
75.50.Mm Magnetic liquids
75.50.Tt Fine-particle systems; nanocrystalline materials

Ultrasensitive displacement sensing using photonic crystal waveguides

O. Levy, B. Z. Steinberg, M. Nathan, and A. Boag

Appl. Phys. Lett. 86, 104102 (2005); http://dx.doi.org/10.1063/1.1880453 (3 pages) | Cited 10 times

Online Publication Date: 3 March 2005

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We present an ultrasensitive displacement sensor and sensing technique based on photonic crystal waveguides (PCWG), useful for integration with microelectromechanical system (MEMS) structures. The sensor consists of two PCWGs aligned along a common axis, one mounted on a moving part and the other fixed to a stationary substrate. A gap between the fixed and moving PCWGs creates an intersection with a third, perpendicular PCWG, which has two branches. The intensity exiting each PCWG changes when the suspended PCWG moves in plane relative to the fixed one. The difference in intensities exiting the two perpendicular PCWG branches can be correlated with the relative displacement between the fixed and moving PCWGs. Numerical simulations predict a sensitivity of ∼ 1[μm−1] using a light source of 9.02 μm.
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06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
42.79.Gn Optical waveguides and couplers
42.70.Qs Photonic bandgap materials
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
42.79.Pw Imaging detectors and sensors
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