Precise Arrays of Epitaxial Quantum Dots Nucleated by In-Situ Laser Interference for Quantum Information Technology Applications

Yun-Ran Wang, Mark Hopkinson
2020 Zenodo  
Precisely ordered arrays of InAs quantum dots are formed on a nanoisland-structured GaAs (100) surface using in-situ laser interference during self-assembled molecularr beam epitaxial growth. Nanoislands induced by single-pulse four-beam laser interfer-ence act as preferential nucleation sites for InAs quantum dots and result in site occupation dependent on the size of nanoislands, the InAs coverage and the laser parameters. By optimizing the growth and interference conditions, regular dense
more » ... ering of single dots was obtained for the first time using this in-situ noninvasive approach. The photoluminescence spectra of the resulting quantum dot arrays with a period of 300 nm show good optical quality and uniformity. This technique paves the way for the rapid large-scale fabrication of arrays of single dots to enable quantum information technology device platforms.
doi:10.5281/zenodo.4106535 fatcat:qbr6aa5slvbobck5nst5yx5zhy