It is a remarkable and straightforward approach to customize the dispersion and nonlinear
properties of the photonic devices without varying the composition of the material by …

The combination of electrochemistry and spectroscopy, known as spectroelectrochemistry
(SEC), is an already established approach. By combining these two techniques, the …

Nanophotonic waveguides that implement long optical pathlengths on chips are promising
to enable chip-scale gas sensors. Nevertheless, current absorption-based waveguide …

Alloys of sulfur, selenium and tellurium, often referred to as chalcogenide semiconductors,
offer a highly versatile, compositionally-controllable material platform for a variety of passive …

The integration of Ge on Si for photonics applications has reached a high level of maturity:
Ge photodetectors are available on the Si platform in foundry processes, and Si/Ge …

In this article, the potential of photonic integrated circuits (PICs) for modern gas sensing
applications is discussed. Optical detection systems can be found at the high-end of the …

Mid-infrared (mid-IR) absorption spectroscopy based on integrated photonic circuits has
shown great promise in trace-gas sensing applications in which the mid-IR radiation directly …

The development of compact and fieldable mid-infrared (mid-IR) spectroscopy devices
represents a critical challenge for distributed sensing with applications from gas leak …

In recent years, sensing and communication applications have fueled important
developments of group-IV photonics in the mid-infrared band. In the long-wave range, most …

This article presents an overview of the current status and future prospects of integrated
nonlinear photonics in the long-wave infrared (LWIR) spectrum, spanning 6 to 14 μm. This …