MOCVD grown low dislocation density GaAs-on-V-groove patterned (001) Si for 1.3 μ m quantum dot laser applications
Abstract
We report the development of gallium arsenide (GaAs) films grown on V-groove patterned (001) silicon (Si) by metalorganic chemical vapor deposition. This technique can provide an advanced virtual substrate platform for photonic integrated circuits on Si. A low defect density of 9.1 × 106 cm−2 was achieved with the aspect ratio trapping capability of the V-grooved Si and dislocation filtering approaches including thermal cycle annealing and dislocation filter layers. The efficiencies of these dislocation reduction methods are quantified by statistical electron channeling contrast imaging characterization. Meanwhile, different sets of dislocation filtering layers are evaluated and optimized. To further demonstrate the suitability of GaAs on the V-grooved Si technique for Si-based photonic devices, especially for the appealing 1.3 μm quantum dot (QD) lasers, a 7-layer indium arsenide QD structure was grown on both GaAs-on-V-grooved Si and native GaAs substrates. The same photoluminescence intensity and full-width at half-maximum values were observed for both structures. The optimization methodology in this work therefore offers a feasible approach to realize high quality III–V materials on Si for large-scale integration.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 29, 2019
- Source ID
- 10.1063/1.5090437
Entities
People
- Aidan A. Taylor
- Bei Shi
- Bowen Song
- Hongwei Zhao
- Jonathan Klamkin
- Lei Wang
- Simone Tommaso Šuran Brunelli
Organizations
- Defense Advanced Research Projects Agency
- University of California
- University of California, Santa Barbara