Internship Project
Physics

2-photon interference of the NV defect centre in diamond

Institution
Humboldt-Universität zu Berlin,
Department of Physics
Subject Area
Integrated Quantum Photonics
Availability
Position filled in 2023.

 
Internship Modality:
On-site internship in Berlin

Project Supervisor(s)
Laura Orphal-Kobin,
Dr. Tim Schröder 
Contact: orphal@physik.hu-berlin.de
Academic Level
Advanced undergraduate students (from third year) 
Master's students 
Ph.D. students 
Language
English (not required but helpful: German)
Further Information
Project Type
Academic Research
Project Content
2-photon interference (TPI) is a fundamental requirement for the implementation of protocols based on photon-mediated entanglement in quantum networks. In this project, TPI of NV defect centres in diamond will be investigated. By exciting a single defect inside a nanophotonic structure, TPI will be demonstrated with an interferometric setup. By increasing the time difference between the interfering photons, the coherence of the defect will be mapped out. As a next step, a sequence of coherent control pulses will be applied to the defect, which is expected to lead to improved optical properties of the defect and consequently to an enhanced coherence of the emitted photons.  
Tasks for Interns
  • Build mainly fibre-based setup;
  • Do the measurements;
  • Analyze the data.
Academic Level
Advanced undergraduate students (from third year) 
Master's students 
Ph.D. students 
Requirements
  • Highly motivated;
  • Experience in setting up optical experiments
Expected Preparation
Literature study, participation in group discussions
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For more information on the Humboldt Internship Program or the project, please contact the program coordinator.