Research Article
Determination of the Thermal Diffusivity of Plasmonic Nanofluids Containing PVP-Coated Ag Nanoparticles Using Mode-Mismatched Dual-Beam Thermal Lens Technique
Figure 4
Sketch of the mode-mismatched dual-beam thermal lens technique: lens (L), mirror (M), sample (S), shutter (Sh), iris (I), IR filter (F), and photodetector (PD). represents the focal distance.