Journal article
Picosecond response times in GaAs/AlGaAs core/shell nanowire-based photodetectors
Applied physics letters, v 98(24), pp 241113-241113-3
13 Jun 2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
High-speed metal-semiconductor-metal (MSM) photodetectors based on Schottky-contacted core/shell GaAs/AlGaAs and bare GaAs nanowires were fabricated and characterized. The measured core/shell temporal response has a similar to 10 ps full-width at half-maximum and an estimated corrected value less than 5 ps. The bare GaAs devices exhibit a slower response (similar to 35 ps) along with a slow decaying persistent photocurrent (similar to 80 s). The core/shell devices exhibit significantly improved dc and high-speed performance over bare nanowires and comparable performance to planar MSM photodetectors. The picosecond temporal response, coupled with picoampere dark current, demonstrate the potential for core/shell nanowires in high-speed imaging arrays and on-chip optical interconnects. (C) 2011 American Institute of Physics. [doi:10.1063/1.3600061]
Metrics
Details
- Title
- Picosecond response times in GaAs/AlGaAs core/shell nanowire-based photodetectors
- Creators
- Eric M. Gallo - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAGuannan Chen - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAMarc Currie - USN, Res Lab, Div Opt Sci, Washington, DC 20375 USATerrence McGuckin - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAPaola Prete - Consiglio Nazl Ric CNR, Ist Microelettron Microsistemi IMM, I-73100 Lecce, ItalyNico Lovergine - Univ Salento, Dept Innovat Engn, I-73100 Lecce, ItalyBahram Nabet - Drexel UniversityJonathan E. Spanier - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
- Publication Details
- Applied physics letters, v 98(24), pp 241113-241113-3
- Publisher
- American Institute of Physics
- Number of pages
- 3
- Grant note
- DMR-0907381; DGE-0538476 / NSF; National Science Foundation (NSF) Office of Naval Research W911NF-08-1-0067 / U.S. Army Research Office
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000291803600013
- Scopus ID
- 2-s2.0-79960582599
- Other Identifier
- 991019168279404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied