Journal article
An Unconventional Hybrid Variable Capacitor With a 2-D Electron Gas
IEEE transactions on electron devices, v 61(2), pp 445-451
Feb 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Moderation of internal quantum mechanical energies, such as exchange energy of an unconventional contact, comprised of a system of 2-D charge carriers, improves performance merits of variable capacitors, varactors, mainly in tuning ratio (TR), and sensitivity, S. Energy transfer from the unconventional contact to the dielectric increases the energy density and enhances the capacitance of the varactor. Here, we analyze the performance of an unconventional varactor based on a planar metal-semiconductor-metal (MSM) structure with an embedded layer of high-density 2-D electron gas (2DEG). Through localized field-assisted manipulation of the 2DEG density, a twice larger equilibrium capacitance and a minimum capacitance, less than the geometric capacitance of a conventional MSM, are achieved. Moreover, the maximum capacitance increases through a Batman-shaped capacitance enhancement at a threshold voltage. Therefore, giant is attained while maintaining quality factors of up to 30. Capacitance-voltage characteristics exhibit a switched-capacitor behavior with S as high as 350 that is due to localized transitions from a dense 2DEG to a complete depletion. This MSM 2-D varactor combines the unconventional features of 2DEG with superior electrical properties of MSMs.
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Details
- Title
- An Unconventional Hybrid Variable Capacitor With a 2-D Electron Gas
- Creators
- Pouya Dianat - Drexel UniversityRichard Prusak - Drexel UniversityAnna Persano - Institute for Microelectronics and MicrosystemsAdriano Cola - Institute for Microelectronics and MicrosystemsFabio Quaranta - Institute for Microelectronics and MicrosystemsBahram Nabet - Drexel University
- Publication Details
- IEEE transactions on electron devices, v 61(2), pp 445-451
- Publisher
- IEEE
- Grant note
- ECCS-0702716 / National Science Foundation ASEE-ONR Summer Faculty Research Fellowship U.S. Department of Energy, Office of Basic Energy Sciences Office of Naval Research CNR short-term mobility grants
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000330620600029
- Scopus ID
- 2-s2.0-84893795261
- Other Identifier
- 991019167888204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Electrical & Electronic
- Physics, Applied