Probe beam 4 Thermal diffusion 4 Thermal diffusivity 4 2D imaging 2 Adsorption 2 Calibration 2 Chemical bonds 2 Collinear lasers 2 Cross section 2 Crystallographic phasis 2 Deflection signals 2 Electric potential 2 Electrostatic adsorption 2 Frequency dependence 2 Hardened steel 2 Hardness 2 Ion exchange 2 Liquid electrolyte 2 Metallic samples 2 Multilayers 2 Non-contact 2 Optical microscopes 2 Phase characterization 2 Photo-thermal 2 Photodeflection detection 2 Photothermal methods 2 Poly(styrene sulfonate) (PSS) 2 Polyelectrolytes 2 Polystyrenes 2 Probe beam deflection (PBD) 2