Tunnel Quantum Dot Intersubband Detector for Terahertz Frequencies
Final rept. 1 Aug 2006-8 Sep 2009
MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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The most significant accomplishments in this project are a the demonstration of a semiconductor based terahertz detector using quantum dots, capable of detection at high temperatures 80-150K with very low dark currents b a bias-selective multicolor long wavelength quantum dot intersublevel detector with tunability over 3 distinct wavelengths. The detector incorporates a novel double barrier tunneling heterostructure with each absorbing quantum dot layer c a novel intersubband quantum ring terahertz detector with a resonant tunneling filter to reduce the dark current, which is the lowest ever measured. This device demonstrates terahertz detection with 0.4AW in the 3-6THz range and detection in the 10-11 ThZ range at 120K.
- Quantum Theory and Relativity
- Radiofrequency Wave Propagation