All-optical ultrasound sensing in photonic crystal slabs aided by PMMA (Conference Presentation)

Eric Y. Zhu; Maria C. Charles; Cory Rewcastle; Raanan Gad; Li Qian; Ofer Levi

doi:10.1117/12.2545146

20 April 2020 All-optical ultrasound sensing in photonic crystal slabs aided by PMMA (Conference Presentation)

Eric Y. Zhu, Maria C. Charles, Cory Rewcastle, Raanan Gad, Li Qian, Ofer Levi

Proceedings Volume 11240, Photons Plus Ultrasound: Imaging and Sensing 2020; 1124012 (2020) https://doi.org/10.1117/12.2545146
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

Silicon photonics-based photonic crystal slab (PCS) ultrasound sensors have recently been demonstrated to have properties such as broadband (1-40 MHz) detection and sub-kPa sensitivities. Here, we study the effect of a thin PMMA overlayer (~ 300 nm) on the sensitivity of a PCS sensor. The presence of this overlayer can result in almost 50% of the electric field energy of the PCS guided resonance to reside outside of the slab. This allows for the PCS to be sensitized to multiple mechanisms, including photoelastic change and mechanical deformation of the overlayer, for ultrasonic detection. These mechanisms are investigated in this work.

Conference Presentation

Citation Download Citation

Eric Y. Zhu, Maria C. Charles, Cory Rewcastle, Raanan Gad, Li Qian, and Ofer Levi "All-optical ultrasound sensing in photonic crystal slabs aided by PMMA (Conference Presentation)", Proc. SPIE 11240, Photons Plus Ultrasound: Imaging and Sensing 2020, 1124012 (20 April 2020); https://doi.org/10.1117/12.2545146

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