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Quantera: uTP4Q

Full Name: A versatile quantum photonic IC platform enabled by micro-transfer printing

Duration: 1/5/2022-2/3/2025


  • Dries Van Thourhout, Dries Van Thourhout (Ghent University, BE)
  • Wolfram Pernice (Heidelberg University, DE)
  • Leonardo Midolo (University of Copenhagen, DK)
  • Niels Hersoug (Sparrow Quantum, DK)
  • Janez Krc (Univerza v Ljubljani , SI)
  • Michel Despont, Amir Ghadimi (Swiss Centre for Electronics and Microtechnology, CH)


  • We will demonstrate the benefits of heterogeneous integration of different materials by combining InAs quantum dot emitters, Lithium Niobate modulators and switches, and superconducting detectors on a mature foundry-based silicon nitride waveguide interposer. To achieve such seamless integration between various well-established architectures, it is necessary to develop a robust and industry-ready baseline for cross-platform integration.
  • uTP4Q will employ micro-transfer printing as the key technological framework for combining multiple functional technologies for quantum optical processing on a Silicon Nitride waveguide interposer. This is where uTP4Q is ground-breaking: for the first time we will integrate several building blocks of different nature on a single SiN waveguide interposer.

INTEC's Role:

  • Project Coordinator
  • Design, development and execution of microtransfer printing process

Project Web site:

People involved

Publications in the framework of this project (5)

        International Conferences

      1. J. Krc, M. Ljubotina, A. Debevc, I. Luntadila Lufungula, J. De Witte, L. Midolo, M. Topic, D. Van Thourhout, Design of Coupling and Splitting Structures for SiN Interposer for Quantum Photonic Integrated Circuits, accepted for publication in Conference on Lasers and Electro-Optics,  (to be published).
      2. M. Ljubotina, Z. Liu, M. Midolo, J. De Witte, D. Van Thourhout, M. Topic, J. Krč, Analysis of optical losses of GaAs waveguides for single-photon sources considering realistic waveguide roughness, accepted for publication in SPIE Photonics Europe,  (to be published).
      3. J. Krc, A. Debevc, M. Ljubotina, M. Topic, J. De Witte, I. Luntadila Lufungula, L. Midolo, C. Pedersen, A. Hossein Ghadimi, H. Sattari, M. Despont, S. Ferrari, W. Pernice, D. Van Thourhout, Heterogenous Photonic Integration for Quantum Optical Communication, International Workshop on Fiber Optics on Access Networks (FOAN), Belgium, p.17 doi:10.1109/FOAN59927.2023.10328119 (2023)  Download this Publication (636KB).
      4. D. Van Thourhout, Heterogeneous Integration for Quantum PICS, Tenth Annual Bristol Quantum Information Technologies Workshop (invited), United Kingdom, (2023)  Download this Publication (125KB).
      5. I. Luntadila Lufungula, B. Kuyken, Non-reciprocal transmission in ring resonators with saturable absorption, Annual Symposium of the IEEE Photonics Society Benelux Chapter 2022, Netherlands, (2022)  Download this Publication (310KB).