Nano-optomechanical structures enable displacement and force sensing with ultimate precision, but their practical application is hindered by the complexity of the optical coupling. Here, we demonstrate that nano-optomechanical sensing can be realized on a fiber-tip without the use of any coupling optics. We use a photonic crystal optomechanical structure fabricated using standard wafer-scale processing. Afterwards the sensors are transferred on a fiber-tip using a simple pickup method. We demonstrate thermomechanical noise measurements with a high signal to noise ratio, using simple reflectance read-out via the fiber.

SPIE-The International Society for Optics and Photonics
doi.org/10.1117/12.2606052
Photonic Forces

Hendriks, A.L, Picelli, L, Lindgren, G, van Klinken, A, Hakkel, K.D, Pagliano, F, … Fiore, A. (2022). Optomechanical sensing on a fiber-tip (Conference Presentation). In Proc. SPIE PC12016, Optical and Quantum Sensing and Precision Metrology II. SPIE-The International Society for Optics and Photonics. doi:10.1117/12.2606052