[5][6] His research interests encompass studies of physical energy conversion processes in condensed and biological matter as they impact instrumentation science and signal generation technologies with applications spanning the development of a wide spectrum of novel instrumentation, measurement and imaging techniques using optical-to-thermal, thermoelastic, electronic, ultrasonic and/or photonic energy conversion high-dynamic-range and high-sensitivity analytical methodologies, leading to advanced non-destructive / non-invasive diagnostic, inspection and monitoring technologies [1][2][3] with major focus on advanced dynamic imaging instrumentation for industrial and biomedical applications.

He then pursued graduate studies at Princeton University, where he received a Ph.D. in Applied Physics and Materials Science in 1980 after completing a doctoral dissertation titled "Theory of the frequency and time domain photoacoustic spectroscopy of condensed phases.

[10] He has several inventions, 43 patents and patents pending in the areas of photothermal tomographic imaging, signal processing and measurement, hydrogen sensors, dental and soft and hard tissue laser diagnostics (biothermophotonics), several semiconductor optoelectronic non-destructive diagnostic technologies and laser biophotoacoustic and biothermophotonic imaging.

[7][10] He is also the director of the Institute for Advanced Non-Destructive and Non-Invasive Diagnostic Technologies (IANDIT) in the Faculty of Applied Science and Engineering at the University of Toronto.

He is considered a pioneer in the fields of diffusion-wave, photothermal and photoacoustic sciences and related technologies and his research is recognized as having helped define and develop these areas.

[5][11][20] He also pioneered the Thermal-Wave Resonant Cavity, which has applications in the fields of molecular thermophysics, kinetic theory and the infrared emissivity of fluids.

[11] His current research interests include building theoretical and experimental foundations of thermophysical, biothermophotonic and biophotoacoustic transport phenomena, high-performance diagnostic imaging techniques and advanced signal generation and processing methods ("waveform engineering") for semiconductors, photovoltaic solar cells, hard (dental, bone) and soft tissues, novel photothermal biosensors, and defect inspection in industrial materials.

[1][11] Examples of applications are in the fields of alternative clean energy conversion devices (e.g. solar cells, nano-optoelectronics devices), industrial manufactured products (steels, metal composites, nano-coatings), thermophysical inverse problems in solids and industrial materials, and biomedical and dental disease diagnostics, with major focus on advanced dynamic imaging instrumentation.