Integration of unstrained quantum dots into self-assembled photonic structures

• Grant number: 23/01517-9
• Support Opportunities: Scholarships abroad - Research
• Start date: September 01, 2023
• End date: March 01, 2024
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Christoph Friedrich Deneke
• Grantee: Christoph Friedrich Deneke
• Host Investigator: Armando Rastelli
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Institution abroad: Johannes Kepler University Linz (JKU), Austria

Abstract

In this project, we plan to integrate unstrained quantum dots as optical emitters into the walls of whispering gallery mode resonators fabricated by roll-up. Therefore, a 6 month research visit of the proposer to the Johannes Kepler Univserität (JKU), Linz, Austria is suggested. Hereby, we want to combine the expertise of the proposer with the expertise of the JKU group to fabricate a unique structure for future research in the field of opto-electronic devices, 2D material/semiconductor hybrid structures as well as quantum information experiments. Unstrained quantum dots have been established as solid state single photon sources with a high potential for integration into existing semiconductor technology. The JKU group is one of the leading groups producing such samples and using them for the generation of entangled photon pairs and single photons for quantum optics and quantum information experiments. The device applications normally require the integration of the quantum dots into photonic structures. Whispering gallery mode resonators are photonic resonators with high quality factors and good compatibility to existing semiconductor devices. They can be formed by a self-assembly process of releasing a pre-strained semiconductor heterostructure from its substrate. The combination of the two techniques - unstrained quantum dots as optical emitters in rolled-up wishing gallery mode resonators - offers a unique platform for basic physics as well as potential device fabrication. Furthermore, such structures are ideal candidates for future hybrid structures combining semiconductor technology with 2D materials like graphene or transition metal dichalcogenide (TMD). (AU)