Scalable arrays of rf Paul traps in degenerate Si

J. Britton, D. Leibfried, J. A. Beall, R. B. Blakestad, J. H. Wesenberg, and D. J. Wineland

We report techniques for the fabrication of multizone linear radio frequency Paul traps that exploit the machinability and electrical conductivity of degenerate silicon. The approach was tested by trapping and laser cooling ²⁴Mg⁺ ions in the two following trap geometries: a single-zone two-layer trap and a multizone surface-electrode trap. One application of these devices is controlled manipulation of atomic ion qubits, the basis of one form of quantum information processing.

Appl. Phys. Lett. 95, 173102 (2009)

Energetic disorder limits energy transfer in semiconductor nanocrystal–DNA–dye conjugates

Klaus Becker, Andrey L. Rogach, Jochen Feldmann, Dmitri V. Talapin, and John M. Lupton

These results show the importance of the spectral overlap between emission of a single donor and absorption of a single acceptor in its close vicinity, which determines the microscopic resonance and transfer efficiency between individual neighbors. This has important implications on the applicability of ensemble spectral overlap for the analysis of distance dependencies of nanoscopic objects.

Appl. Phys. Lett. 95, 143101 (2009)

Direct near-field optical investigation of phase-change medium in blue-ray recordable and erasable disk

Jen-You Chu, Shen-Chuan Lo, Shu-Chen Chen, You-Chia Chang, and Juen-Kai Wang

We report a direct examination of recorded marks in blue-ray recordable and erasable disks with scattering-type scanning near-field optical microscopy. The revealed near-field signatures show a potential influence on the carrier-to-noise ratio of this optical storage medium.

Appl. Phys. Lett. 95, 103105 (2009)