Nanoscale Detectors: Proof of Concept
Abstract
The conduction and thermopower of several different low temperature, high mobility mesoscopic GaAs devices has been studied. Quantum point contacts, quantum dots, and finite period lateral superlattices were all studied. We have found evidence for unexpected electronic waveguide-like transport through multiple gate superlattices. Thermoelectric cooling in quantum dot/waveguide structures has been shown to be anomalously large and the thermopower reveals the internal energy level structure of the dot. Both quantum point contacts and quantum dots have been shown to act as bolometers for microwave radiation. New, hybrid low temperature grown/high mobility GaAs devices have been fabricated to permit on-chip picosecond electro-optic signal generation. Tests have been performed to study photoconductive switch performance and to study the response of mesoscopic devices to terahertz bandwidth signals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 23, 1998
- Accession Number
- ADA358140
Entities
People
- Ilesanmi Adesida
- Russell Giannetta
Organizations
- University of Illinois Urbana–Champaign