Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1988-03-28
1990-02-20
Mintel, William
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
357 4, 357 16, 357 58, 357 32, 25037014, H01L 2714
Patent
active
049031015
ABSTRACT:
A novel infrared detector (20, 20', 20"), is provided, which is characterized by photon-assisted resonant tunneling between adjacent quantum wells (22a, 22b) separated by barrier layers (28) in an intrinsic semiconductor layer (24) formed on an n.sup.+ substrate (26), wherein the resonance is electrically tunable over a wide band of wavelengths in the near to long infrared region. An n.sup.+ contacting layer (34) is formed over the intrinsic layer and the substrate is n.sup.+ doped to provide contact to the quantum wells. The detector permits fabrication of arrays (30) (one-dimensional and two-dimensional) for use in imaging and spectroscopy applications.
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California Institute of Technology
Mintel William
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