Dissertation
Gallium arsenide based metal-semiconductor-metal devices and detectors
Doctor of Philosophy (Ph.D.), Drexel University
Sep 2010
DOI:
https://doi.org/10.17918/etd-6646
Abstract
Each year the creation and refinement of new material growth techniques give rise to novel material systems for electronic device exploration. A metal-semiconductor-metal (MSM) device is the simplest electronic device possible, consisting of two metal contacts on a semiconducting channel. Despite their simplicity, these devices can operate as high performance detectors as well as enable rapid characterization of novel electronic materials. This thesis will discuss the fabrication and characterization of MSM devices on a two-dimensional electron hole gas (2DEHG) and GaAs-based nanowires. 2DEHG structures consist of two spatial separated quantum wells of opposite charge. These devices exhibit a high-speed photo-response, a two plateau varactor response and give rise to several unexplained photoluminescence peaks. GaAs-based nanowire MSMs offer the opportunity to fabricate many of the well known bulk III-V semiconductor devices on the nanoscale. Accomplishing this requires quality ohmic contacts. Several fabrication methods to create ohmic contacts on GaAs nanowires are described, as well as characterization of the light response of these devices and results demonstrating ambipolar transport in a wide bandgap material. The devices offer promise as high speed on-chip interconnects for digital circuits.
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Details
- Title
- Gallium arsenide based metal-semiconductor-metal devices and detectors
- Creators
- Eric Michael Gallo - DU
- Contributors
- Jonathan E. Spanier (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xvii, 134 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Electrical (and Computer) Engineering (1970-2026); Drexel University
- Other Identifier
- 6646; 991014632218304721