Photonic and Quantum Thermometry using Active Resonator Compound Semiconductor Photonic Integrated Circuits

Dataset for Phil. Trans. Royal Soc. A paper with the following details: Photonic and Quantum Thermometry using Active Resonator Compound Semiconductor Photonic Integrated Circuits Semiconductors are extremely useful for temperature sensing due to their sensitivity to thermal changes in their properties. Silicon, the most widely used semiconductor, underpins modern electronics and is increasingly important in integrated photonics, offering a cost-effective platform for optical sensors. Silicon-based ring resonator temperature sensors operate via the temperature-dependent change in silicon’s refractive index (dn/dT), which affects the optical modes in the ring. However, silicon has two main limitations: its indirect bandgap makes it a poor light emitter, necessitating external light sources, and its thermal properties are fixed. In contrast, compound semiconductors such as InP, GaAs, GaN, and InAs have direct bandgaps, making them efficient light emitters commonly used in LEDs and lasers. Their thermal properties can also be tailored through alloying. These features make them ideal for "active resonator" temperature sensors with integrated light sources, allowing customisation for various temperature ranges. This discussion paper focuses on InP-based alloys, highlighting their fundamental properties and potential for integration into active quantum well-based heterostructures. These can be fabricated into micro-ring and other resonator designs. Integrating light sources within the sensor enhances both simplicity and functionality, paving the way for versatile temperature sensors suited to a wide range of applications. Dataset available to be used for bona fide reasons only.