Growth and properties of rare-earth arsenide InGaAs nanocomposites for terahertz generation
Abstract
We explore the electrical, optical, and structural properties of fast photoconductors of In0.53Ga0.47As containing a number of different rare-earth arsenide nanostructures. The rare-earth species provides a route to tailor the properties of the photoconductive materials. LuAs, GdAs, and LaAs nanostructures were embedded into InGaAs in a superlattice structure and compared to the relatively well-studied ErAs:InGaAs system. LaAs:InGaAs was found to have the highest dark resistivities, while GdAs:InGaAs had the lowest carrier lifetimes and highest carrier mobility at moderate depositions. The quality of the InGaAs overgrowth appears to have the most significant effect on the properties of these candidate fast photoconductors.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 23, 2015
- Source ID
- 10.1063/1.4913611
Entities
People
- Dahee Jung
- E. M. Krivoy
- K M McNicholas
- M. L. Lee
- R. Salas
- S. Guchhait
- Scott Sifferman
- Seth R. Bank
- V. D. Dasika
Organizations
- Army Research Office
- University of Texas at Austin
- Yale University