Abstract not found

By use of high index ratios, Ultra High Confinement waveguides are created. These UHC waveguides make compact devices, sharp bends, and 100,000 electro-optical components per square centimeter, all with three dimensional packaging.

Manipulation of spins at the nanoscale is one of the ultimate goals of spintronics, where new concept devices can be envisioned. We present a theoretical study of two prototypical systems, namely magnetic point contacts, and molecular spin valves. We model these systems with a combination of non-equilibrium transport techniques and electronic structure methods such as the self-consistent tight-binding model and density functional theory. In the case of the point contacts we demonstrate that, in addition to a large magnetoresistance, asymmetries in the I-V characteristic are possible. In particular diode-like curves can arise when a domain wall is placed off-centre within the point contact, although the whole structure does not present any structural asymmetry. In contrast magnetic spin valves are obtained by sandwiching small molecules between transition metal contacts. Also in this case the transport depends on the magnetic configuration of the contacts and typical spin-valve-like magnetoresistance behaviour is found. Interestingly for small molecules the sign of the magnetoresistance depends on the bias. 1.

in the metallic cladding layers into account, it is demonstrated that such heterostructures allow out-of-plane energy confinement below the diffraction limit. An application in the form of a metal nanoparticle plasmon waveguide operating via evanescent coupling of gap modes is presented, and conclusions

A method for suspending micro-ring resonators in a silicon-on-insulator substrate was developed. Due to the low insertion loss of the suspension mechanism and high confinement of the resonant cavity, quality factors exceeding 15,000 of micron-size suspended rings were achieved. Often, applications

High-confinement-mode (H-mode) plasma together with a dissipative divertor and low core Zeff. The initially attached plasma is characterized by steady-state enhancement factor, HITER89P [P.N. Yushmanov, et al., Nucl. Fusion 3 0, 1999 (1990)], of 1.9, central Zeff of 1.1, and a radiative fraction

and disposal, in whole or in part, by or for the United States government is permitted. Observations and empirical scalings of the high-confinement mode pedestal on Alcator C-Mod J.W. Hughes, D.A. Mossessian, A.E. Hubbard, B. LaBombard, E.S. Marmar On the Alcator C-Mod tokamak [Phys. Plasmas 1

conspicuous acknowledgement of where and by whom the paper was presented. ABSTRACT: The analysis of the volumetric behavior and the consolidation of shales require the involved materials to be tested under high confining stresses. The paper presents the apparatuses and the techniques that have been developed

We report experimental realization of subwavelength slot waveguides that exhibit both micrometer-range propagation and high spatial confinement of light. Attention is given to rectangular waveguides with a Si3N4 core and Ag cladding; core thicknesses of 50−100 nm and widths of 250 nm − 10 µm

The manner in which the dynamics of a polymer are affected by thin film confinement is of technological significance, impacting thin film applications such as lubricants, adhesives, and chemically amplified photoresists. In this manuscript we use specular X-ray reflectivity (SXR), beam positron