Optomechanical sensing on a fiber-tip (Conference Presentation)

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.