U. s. semiconductor technology for device fabrication is highly developed, but it is not well coupled to the needs of the doe high energy physics program. the research proposed herein would address that problem by putting us in a position to create (under phase 2) a commercial interface between the… More

The purpose of this research is to develop a system for the objective analysis of physiological data (eeg, emg, eog, heart rate, respiration, temperature) occurring during sleep. the system will consist of a preprocessor, designed around a new high-speed signal processor, and a host com- puter. the… More

Research and development will be carried out on cryogenic extrinsic silicon infrared (ir) detector systems which perform intensity-to-frequency conversion at the focal planevia simple circuits with very low power consumption. the incident ir intensity controls the repetition rate of short duration… More

The use of logic circuits employing heterojunction double barrier diodes with negative differential resistance regions will be examined theoretically. switching time limitations will be estimated based on circuit considerations and the device architecture. fundamental limitations arising from… More

Research is proposed on silicon devices which provide a natural basis for parallel asynchronous focal plane image preprocessing. the simplicity and novel properties of the devices would permit an independent analog processing channel to be dedicated to every pixel. a laminar architecture built from… More

Research will be carried out on quantum well infrared sources employing resonant tunneling and intraband transitions in the 3-5 micron and 8-12 micron wavelength regions. the device structures which we propose are triple barrier diodes (tbds). in contrast with conventional solid state lasers and… More

The project will involve the development of heterostructure infrared detectors for use at wavelengths greater than 14 microns and at operating temperatures between 40k and 80k. the heterostructures are superlattice detectors operated in a photovoltaic mode. a key feature of the detectors is thatthey… More

The object of this project is to develop and implement the concept of a computer workstation for neurology. the system will have all the present functionality of the eeg machine, but will be enhanced with characteristics intrinsicto the computer. the possibilities of the instrument for the clinical… More

The project will focus on the design and development of a high performance gaas/a1gaas multiquantum well (mgw) infrared detector array suitable for operation in the 8-12 micron spectral range. emphasis will be placed on detector and array formats consistentwith the special requirements of ir staring… More

This project will focus on the design and hardware development of a spectro-imager that will be developed and tested under phase ii. processing of multispectral image information will be performed in a two-dimensional parallel asynchronous mode by the spectro-imager. to acquire and process the… More

The project involves the development of a new class of infrared detectors that are called homojunction barrier detectors because the photodetection process involves excitation over such barriers. the detectors are particularly promising for focal-plane-array applications requiring a high degree of… More

The project will focus on developing procedures for the fabrication and evaluation of epitaxial layers of iii-v compound semiconductors which are doped with rare earth (re) ions. the re ions are to be incorporated in a 3+ valency such that efficient intraatomic (4f-4f) transitions can be observed.… More