Three photonics firms build the first commercial light switch for quantum and atomic-sensor hardware

A new light-controlling chip, built by three companies on a commercial Swiss photonics line, has cleared a manufacturing barrier that kept quantum and atomic-sensor hardware tied to single-wafer demonstrations. The hybrid device is the first to combine an organic switching material with a glass-like chip base that stays transparent into visible light. It was fabricated by US materials developer NLM Photonics, Swiss foundry LIGENTEC, and design firm Spark Photonics (NLM press release).

Standard silicon photonic chips absorb visible light, restricting their active parts to telecom bands. Silicon nitride stays transparent into the visible spectrum but, until now, could not actively switch light on a production line. NLM's Selerion organic electro-optic material, deposited as a back-end layer on LIGENTEC's commercial low-loss silicon-nitride wafers, closes that gap (LIGENTEC technology page; industry coverage).

The companies list photonic qubit routing, quantum key distribution, and laser control for trapped-atom systems as their first target uses. These are the categories that previously had to build their own photonic hardware one wafer at a time.

Backing the move is a Japan-heavy investor syndicate. Pangaea Ventures and Diamond Edge Ventures (Mitsubishi Chemical's arm) joined existing NLM backers Tokyo Ohka Kogyo, Idemitsu Kosan, Emerald Technology Ventures, Oregon Venture Fund, and StoryHouse Ventures. They are chemistry and packaging suppliers positioned to scale the material from demonstration to foundry output.

This is a proof-of-concept, not a shipped product, and the financing is a strategic syndicate, not a volume commitment.