Accession Number:

ADA513784

Title:

Tunnel Quantum Dot Intersubband Detector for Terahertz Frequencies

Descriptive Note:

Final rept. 1 Aug 2006-8 Sep 2009

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

Personal Author(s):

Report Date:

2009-09-08

Pagination or Media Count:

13.0

Abstract:

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.

Subject Categories:

  • Quantum Theory and Relativity
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE