Integration of Suspended, High Q-Factor Photonic Crystal Cavities Onto Optical Fibre Tips by Transfer Printing

Silicon photonic crystal cavities (PhCC) exhibit high sensitivity to their surrounding environments, making them suitable for a diverse range of sensing applications. These applications include chemical sensing, optomechanical pressure sensing, displacement and radiation pressure measurements, as well as biosensing with potential applications in rapid medical and clinical diagnostics [1]–[3]. The integration of these devices with optical fibre, which offers additional benefits such as flexibility, robustness and immunity to electromagnetic interference [4], enables the development of highly sensitive sensors that can be utilised in challenging environments, such as cryostats or gas chambers.