Fabrication of III-V APDs and SPADs

The offered development services of III-V photonic components aim particularly for APDs and SPADs for the short-wave infrared spectral bands with detection wavelengths around 1550 nm. For this purpose, Fraunhofer IAF can draw on its long-standing III-V epitaxy and process technology for the InGaAs/InP-based material system. The fabricated detector devices can be I-V characterised on-wafer and electro-optically characterised on-chip in a dedicated lab setup. Epitaxial growth and process technology of III-V optoelectronic components, especially InGaAs/InP pin-PDs, APDs, and SPADs. Wafer diameters: 76.2 mm (3 inch), 100 mm (4 inch), multi-project wafer compatible.
Fabrication of III-V APDs and SPADs

Key Insights & References

Value proposition

European III-V quantum photodetector fabrication service, customisable

Bottleneck of SOTA

Quantum photodetectors for 1550 nm either rely on SNSPDs, which require heavy cooling, or III-V semiconductor photodiodes. For the latter, the components usually have to be sourced from outside Europe, which jeopardises security of supply.

Year Published

2025

Application Area

General

Quantum Sensing & Imaging

Sensing/Imaging Type

Photon Detection

Device Type

Quantum Photodetectors

Operating Environment

77 - 300 K

Performance Metrics

Dynamic Range

10 mA - 10 fA dark / photo current

Sensitivity

single photons, typ. PDE ~ 25%

Resolution

> 50 ps

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