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We show detection of CO2 concentrations as low as 500 ppm using a suspended silicon photonic mid-IR waveguide. The performance is enabled by the low propagation loss (2.35 ±0.25) dB/cm permitting sensing with waveguides up to 7 cm in length., QC 20230607

The use of closures, a core language feature of functional programming languages, has become popular in the context of concurrent and distributed programming. Using closures in a concurrent or distributed setting increases safety hazards, however, due to captured variables. Previous work proposed spores, enhanced closures that increase safety by constraining their environment using types. This paper presents Spores3, a completely new library-based implementation of spores for Scala 3. It is shown how the new design is enabled by a unique combination of several new features in Scala 3. Moreover, Spores3 contributes a new, portable approach to serializing closures based on type classes. Its implementation supports the same serialization approach on both the JVM and the JavaScript backends of Scala., QC 20230613