Article

A new method using suspended waveguide-enhanced near-infrared photothermal spectroscopy on a chalcogenide chip enables gas detection at ppb levels. This technology enhances sensitivity, miniaturization, and integration for applications in environmental monitoring, industrial safety, and medical diagnostics.

The design reduces substrate losses and improves response times, making it suitable for real-time monitoring of gases like methane and carbon monoxide. The scalable and portable nature of the system positions it for deployment in IoT applications.