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Journal article
Performance Enhancement of a GaAs Detector with a Vertical Field and an Embedded Thin Low-Temperature Grown Layer
Sensors (Basel, Switzerland), v 13(2), pp 2475-2483
01 Feb 2013
PMID: 23429510
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Low temperature growth of GaAs (LT-GaAs) near 200 degrees C results in a recombination lifetime of nearly 1 ps, compared with approximately 1 ns for regular temperature similar to 600 degrees C grown GaAs (RT-GaAs), making it suitable for ultra high speed detection applications. However, LT-GaAs detectors usually suffer from low responsivity due to low carrier mobility. Here we report electro-optic sampling time response measurements of a detector that employs an AlGaAs heterojunction, a thin layer of LT-GaAs, a channel of RT-GaAs, and a vertical electric field that together facilitate collection of optically generated electrons while suppressing collection of lower mobility holes. Consequently, these devices have detection efficiency near that of RT-GaAs yet provide pulse widths nearly an order of magnitude faster-similar to 6 ps for a cathode-anode separation of 1.3 mu m and similar to 12 ps for distances more than 3 mu m.
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Details
- Title
- Performance Enhancement of a GaAs Detector with a Vertical Field and an Embedded Thin Low-Temperature Grown Layer
- Creators
- Marc Currie - United States Naval Research LaboratoryPouya Dianat - Drexel UniversityAnna Persano - National Research CouncilMaria Concetta Martucci - National Research CouncilFabio Quaranta - National Research CouncilAdriano Cola - National Research CouncilBahram Nabet - United States Department of the Navy
- Publication Details
- Sensors (Basel, Switzerland), v 13(2), pp 2475-2483
- Publisher
- MDPI AG
- Number of pages
- 9
- Grant note
- ECCS-0702716 / NSF Award; National Science Foundation (NSF) ASEE-ONR Summer Faculty Research Fellowship Office of Naval Research
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000315403300063
- Scopus ID
- 2-s2.0-84875184079
- Other Identifier
- 991019168098104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Analytical
- Engineering, Electrical & Electronic
- Instruments & Instrumentation