An Implant-Passivated Blocked Impurity Band Germanium Detector for the Far Infrared

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CB18C
Agency Tracking Number: 094683
Amount: $600,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: S1.04
Solicitation Number: N/A
Small Business Information
CA, Palo Alto, CA, 94306-0658
DUNS: 938517315
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jam Farhoomand
 Principal Investigator
 (650) 650-9833
Business Contact
 Jam Farhoomand
Title: Business Official
Phone: (650) 650-9833
Research Institution
We propose to fabricate a germanium blocked-impurity-band (BIB) detector using a novel process which will enable us to:1- fabricate a suitably-doped active layer using the well-established bulk crystal-growth process, which guarantees excellent dopant control and extremely low compensating impurities, and2- grow the blocking layer using an implant-passivation technique which will produce the required high purity and a very sharp transition from the active to blocking layer.These features are key in design and optimization of the multi-layered structure of BIBs, and their implementation and quality are crucial in optimum operation of these detectors. The proposed process is a drastic departure from conventional epitaxial methods, such as chemical vapor deposition and liquid phase epitaxy, which have yet to produce far IR BIBs suitable for astronomical instruments.Germanium BIBs will offer extended wavelength response up to at least 200µm, high quantum efficiency, high immunity to ionizing radiation, and elimination of long-term transient and memory effects. Coupled with their compatibility with Si cryo-CMOS readout multiplexers and the planar, bump-bond hybridization process, these detectors will make possible the constructionof large format, high sensitivity FPAs for far IR astronomy and will replace the current unstressed and stressed germanium detectors.

* Information listed above is at the time of submission. *

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