1. Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
2. Center for Advanced Diffusion-Wave and Photoacoustic Technologies, University of Toronto, Toronto, Ontario M5S 3G8, Canada
3. Department of Mechanical Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G1H9, Canada
4. Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada