HIGH-SPEED, LONG-WAVELENGTH COHERENT RADIATION DETECTORS
Abstract
The principal consideration in the heterodyne mode of signal detection is the influence of the local oscillator power on detector characteristics. It is shown that misalignment of the local oscillator signal can seriously degrade detection performance with the detector geometry presently used. For signals incident through transparent contacts, misalignment problems are removed. Characteristics of transparent contacts are reported. It has been established that dielectric relaxation time constant effects occur above a certain electric field. These effects, as well as nonlinearities of signal and detector resistance changes, occur at fields for which the drift length of holes is comparable to the electrode separation. This has been shown to be valid by examining detectors having different thicknesses and material having a wide range of carrier lifetimes. Mercury-doped germanium samples which have been subjected to gallium diffusions have larger activation energies than untreated material. This change has been identified with copper gettering by the gallium- diffused surface layer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0663749
Entities
People
- R. L. Williams
Organizations
- Texas Instruments