A miniaturized SNOM sensor based on the optical feedback inside the VCSEL cavity

摘要

We propose and demonstrate an original concept of a near-field sensor using the optical feedback properties of a vertical-cavity surface-emitting laser as an active principle of detection. This is based on the monitoring perturbations induced in the laser cavity by the backscattered light coming from the specimen. Test images confirm the efficiency of proposed SNOM microscope and a solution for the integration of proposed architecture is given.