Precise Arrays of Epitaxial Quantum Dots Nucleated by In Situ Laser Interference for Quantum Information Technology Applications
| Autor: | Mark Hopkinson, Chao-Yuan Jin, Yun Ran Wang, Im Sik Han |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nanostructure
Photoluminescence Materials science Nucleation quantum dots 02 engineering and technology Epitaxy 01 natural sciences Article law.invention nanopatterning Condensed Matter::Materials Science Interference (communication) law InAs 0103 physical sciences nanostructures III−V compound semiconductors General Materials Science laser interference Quantum information 010306 general physics business.industry 021001 nanoscience & nanotechnology Laser Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Quantum dot Optoelectronics 0210 nano-technology business |
| Zdroj: | ACS Applied Nano Materials |
| ISSN: | 2574-0970 |
| Popis: | Precisely ordered arrays of InAs quantum dots are formed on a nanoisland-structured GaAs (100) surface using in situ laser interference during self-assembled molecular beam epitaxial growth. Nanoislands induced by single-pulse four-beam laser interference 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 ordering 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. |
| Databáze: | OpenAIRE |
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