Now showing items 1-10 of 495
High-performance ITO-AlAs/GaAs based resonant cavity enhanced Schottky photodiodes
The fabrication of ITO (indium tin oxide)-AlAs-based resonant cavity enhanced Schottky photodiodes was examined. The device structure was designed to achieve a low-loss cavity around a 840 nm optical communication window. ...
High-speed widely-tunable >90% quantum-efficiency resonant cavity enhanced p-i-n photodiodes
Widely-tunable high-speed resonant cavity enhanced p-i-n photodiodes were designed, fabricated and tested for operation around 820 nm. The structure was grown by solid-source MBE on GaAs substrates and features high-reflectivity ...
XPS investigation of thin SiOx and SiOxNy overlayers
Angle-resolved XPS is used to determine the thickness and the uniformity of the chemical composition with respect to oxygen and nitrogen of the very thin silicon oxide and oxynitride overlayers grown on silicon. (C) 1999 ...
Stokes operators, angular momentum and radiation phase
(Taylor & Francis, 1998)
We present a development of a method determining the quantum phase of radiation via the conservation of the angular momentum. It is shown that a set of generalized Stokes operators can be obtained with the aid of integrals ...
Primes in short segments of arithmetic progressions
(Cambridge University Press, 1998)
Consider the variance for the number of primes that are both in the interval [y, y + h] for y ∈ [x, 2x] and in an arithmetic progression of modulus q. We study the total variance obtained by adding these variances over all ...
Accurate method for obtaining band gaps in conducting polymers using a DFT/hybrid approach
(American Chemical Society, 1998)
DFT calculations on a series of oligomers have been used to estimate band gaps, ionization potentials, electron affinities, and bandwidths for polyacetylene, polythiophene, polypyrrole, polythiazole, and a thiophene - ...
Defects of irreducible characters of p-Soluble groups
(Academic Press, 1998)
We prove a refinement of thep-soluble case of Robinson's conjectural local characterization of the defect of an irreducible character. © 1998 Academic Press.
100-GHz resonant cavity enhanced Schottky photodiodes
(Institute of Electrical and Electronics Engineers, 1998)
Resonant cavity enhanced (RCE) photodiodes are promising candidates for applications in optical communications and interconnects where ultrafast high-efficiency detection is desirable. We have designed and fabricated RCE ...
A theoretical approach to the polymerization of N-pyrrolyl ethyl vinyl ether
The oligomerization mechanism of N-pyrrolyl ethyl vinyl ether is studied for two different routes of polymerization by using quantum mechanical calculations. Model compounds for oligomerization between monomers and ...
Prognostic value of p53 gene mutations in a large series of node-negative breast cancer patients
The most important subgroup of breast cancer patients for which reliable prognostic factors are needed are women without axillary lymph node involvement. Although overall, these patients have a good prognosis, it is known ...