Seminarium Advanced Methods of Semiconductor Research – wtorek 16 czerwca 2026 roku
We cordially invite you to Advanced Methods of Semiconductor Research Seminar on Tuesday 16th of June 2026 at 13:15 in room 321, building A-1, where there will be delivered a lecture:
Towards Quantum Photonic Integrated Circuits for Telecom Quantum Information Processing
by Dr. Paweł Holewa
from Department of Experimental Physics, Wrocław Tech
This presentation is related to the ending period of employment at Wrocław Tech.
The lecture abstract is attached below.
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Quantum photonic integrated circuits (QPICs) are emerging as a promising platform for scalable quantum information processing, combining quantum light sources, photonic circuitry, and single-photon detectors on a single chip. Operation in the telecom C-band around 1550 nm is particularly attractive due to its direct compatibility with existing optical-fibre infrastructure and low transmission losses [1]. In this seminar, I will present recent progress towards QPICs based on self-assembled InAs/InP quantum dots, focusing on the technological developments required to transform individual quantum emitters into scalable building blocks for integrated quantum photonics.
The presentation will cover deterministic fabrication of telecom quantum-dot devices, enhancement of photon extraction using metallic reflectors and photonic cavities, and heterogeneous integration of quantum emitters with silicon-nitride photonic platform. I will discuss our work on bright single-photon sources integrated on silicon [2-3], scalable fabrication of telecom quantum-photonic devices emitting highly indistinguishable photons [4], and recent efforts towards transfer-printed quantum light sources compatible with photonic integrated circuits.
Finally, I will present ongoing activities within the Horizon Europe QPIC1550 project [5], where successive generations of quantum photonic integrated circuits have been developed to implement quantum-information protocols on-chip. The presented chip architectures target experiments including quantum coin flipping, time-bin entanglement, and time-bin fusion operations, while integrating quantum-dot single-photon sources, electro-optic modulators, interferometric circuits, and single-photon detectors on a common platform. Together, these developments establish a pathway towards scalable quantum photonic processors operating directly at telecom wavelengths.
References
[1] P. Holewa et al., Solid-state single-photon sources operating in the telecom wavelength range, Nanophotonics 14, 1729–1774 (2025).
[2] P. Holewa et al., Bright Quantum Dot Single-Photon Emitters at Telecom Bands Heterogeneously Integrated on Si, ACS Photonics 9, 2273–2280 (2022).
[3] A. Nanwani et al., Monolithic Integration of Sub-50 nm III–V Nano-Heterostructures on Si (001) for Telecom Photonics, Adv. Optical Mater., 13, 2403419 (2025)
[4] P. Holewa et al., High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band, Nature Communications 15, 3358 (2024).
[5] https://qpic1550-project.eu/