Mechanics of hemispherical electronics

Shuodao Wang, Jianliang Xiao, Inhwa Jung, Jizhou Song, Heung Cho Ko, Mark P. Stoykovich, Yonggang Huang, Keh-Chih Hwang, and John A. Rogers

A simple analytical model is established for the development of hemisphere electronics, which has many important applications in electronic-eye cameras and related curvilinear systems. The model provides a tool to define a pattern of photodetectors in the planar, as-fabricated layout to yield any desired spatial configuration on the hemisphere.

Appl. Phys. Lett. 95, 181912 (2009)

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)