Structured Nanowires for Spectra-Tuned and Spectra-Multiplexed Sensing THZ Generation
Final rept. 15 Apr 2010-14 Apr 2015
BROWN UNIV PROVIDENCE RI
Pagination or Media Count:
The purpose of this project was to 1. develop a new class of nanoelectronic nanostructures e.g. nanowire and nanowire network structures made of materials whose electronic properties are dependent of size in the nano regime. An example of such a material is bismuth, which can be tuned from metallic to semiconducting at room temperature and, even more dramatically, from superconducting to insulating at cryogenic temperatures, by controlled variation of one physical dimension in the size regime of 50 nm and below, 2. demonstrate the feasibility of tuning along the length of the conduction path and thereby varying the spectral range of the sensing response of the chosen segment, 3. demonstrate the formation of a built-in metallic terminal at the end by increasing the conduction path dimension to the extent 50 nm when it is larger than its Fermi wavelength, 4. fabricate and investigate a novel three-port nanowire structures, 5. conduct research into the steady state spectroscopic characteristics of the fabricated structures and their dependences on the diameter modulation, the base materials, the contact conditions, and the growth and surface conditions, and 6. in the case of a three-port nanowire structure, e.g. a T-junction, test and investigate strategies and implementation of designs for real-time spectral tuning through the third port, 7. in addition to the proposed technology developments and demonstrations, address and establish a good understanding of a number of basic scientific issues arising from the electron transport across the unique quantum mechanical systems of the diameter-modulated and three-terminal nanowires as well as the growth mechanisms.
- Electrical and Electronic Equipment
- Metallurgy and Metallography
- Electricity and Magnetism