Refractive-index-based ultrasound sensing with photonic crystal slabs

We demonstrate ultrasound detection with 500- μ m-diameter photonic-crystal slab (PCS) sensors fabricated from CMOS-compatible technology. An ultrasound signal impinging a PCS sensor causes a local modulation of the refractive index (RI) of the medium (water) in which the PCS is immersed, ...

Source: Optics Letters - May 15, 2019 Category: Physics Authors: Eric Y. Zhu Cory Rewcastle Raanan Gad Li Qian Ofer Levi Source Type: research