SiN is the leading platform for integrated quantum photonics
Among all photonic applications, quantum technologies place the highest premium on optical loss. Unlike classical systems, lost photons cannot be recovered: every fraction of a decibel directly impacts fidelity, entanglement quality, and system scalability.
This is where silicon nitride excels.
LIGENTEC’s ultra-low-loss SiN platform combines propagation loss below 0.5 dB/m, high-Q resonators (Q > 20 million) , negligible two-photon absorption, and wafer-scale manufacturing to provide the foundation for scalable quantum photonic integrated circuits.
The platform supports a broad range of quantum applications, including entangled-photon pair sources, quantum networking, quantum key distribution (QKD), photonic quantum computing, and atom-photonic interfaces. Available across both telecom and visible wavelength regimes, and fabricated on the same 200 mm automotive-qualified process as standard AN800 (800 nm thick SiN) and AN350 (350 nm thick SiN) chips, LIGENTEC’s technology enables researchers and product developers to move beyond proof-of-concept demonstrations toward manufacturable quantum systems.
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See also: QPIC1550 · AN800 · AN150 · Quantum · QKD · Propagation Loss