Biphoton state generation and engineering with bright hybrid III–V/silicon photonic devices

Feb 25, 2026 | MPQ, QITE

The QITE team at the MPQ Laboratory, in collaboration with STMicroelectronics, C2N, and INPHYNI, published a paper in Optica Quantum on the generation and engineering of two-photon states using III-V/SOI hybrid devices.

 

 

 

 

 

Artist’s sketch of the hybrid device: photon pairs are generated in an AlGaAs waveguide. A coupling taper shapes and controls their wavefunction, then transfers them into the underlying silicon waveguide.

This study, featured on the cover of the February 25, 2026 issue, combines an AlGaAs photon-pair source with a silicon photonic platform, enabling room-temperature operation and full compatibility with standard semiconductor technologies.

Operating in the telecommunications C-band, the device delivers high photon-pair generation rates and excellent quantum signal quality. A new integrated coupling scheme allows the generated quantum state to be shaped and controlled directly on the chip.

This breakthrough is a key step towards the development of scalable, electrically driven quantum photonic systems for future applications in quantum communication and information processing.

Reference :
Biphoton state generation and engineering with bright hybrid III–V/silicon photonic devices
L. Lazzari, J. Schuhmann, O. Meskine, M. Morassi, A. Lemaître, M. I. Amanti, F. Boeuf, F. Raineri, F. Baboux, S. Ducci
 

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