Reconfigurable Germanium Quantum-Dot Arrays for CMOS Integratable Quantum Electronic Devices

I. Hsiang Wang, Ting Tsai, Rong Cun Pan, Po Yu Hong, M. T. Kuo, I. H. Chen, Thomas George, H. C. Lin, Pei-Wen Li*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We report the first-of-kind scalability and tunability of Ge QDs that are controllably sized, closely coupled, and self-aligned with control gates, using a combination of lithographic patterning, spacer technology, and self-assembled growth. The core experimental design is based on the thermal oxidation of poly-SiGe spacer islands designated at each included-angle location of designed Si3N4/c-Si ridge structures. Multiple Ge QDs with good size tunability of 7-20 nm were controllably achieved by adjusting the process times for deposition, etch back and thermal oxidation of poly-SiGe spacer islands. Our Ge QDs array provides a common platform for engineering diverse QD electronic devices with desired reconfigurability and optimizing their performance.

Original languageEnglish
Title of host publication2021 Symposium on VLSI Technology, VLSI Technology 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9784863487802
DOIs
StatePublished - 13 Jun 2021
Event41st Symposium on VLSI Technology, VLSI Technology 2021 - Virtual, Online, Japan
Duration: 13 Jun 202119 Jun 2021

Publication series

NameDigest of Technical Papers - Symposium on VLSI Technology
Volume2021-June
ISSN (Print)0743-1562

Conference

Conference41st Symposium on VLSI Technology, VLSI Technology 2021
Country/TerritoryJapan
CityVirtual, Online
Period13/06/2119/06/21

Keywords

  • Germanium
  • Quantum dots
  • Reconfigurability
  • SETs

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