Photothermal Microscopy and
Spectroscopy Webinar

 The field of plasmonic nanoparticle research explores the interactions between light and nanoparticles, leading to applications in diverse areas like biomedicine, microscopy, and nanotechnology. However, current techniques face limitations in accurately capturing the dynamic photothermal processes of nanoparticles under ambient conditions at the nanoscale. In this talk, I will introduce an ultrafast visualization of dynamic heat transfer in the nanosecond temporal regime with a spatial resolution of around 10 nm. We show the heating and cooling stages of a single gold nanoparticle using nearfield optical force imaging, termed decoupled optical force nanoscopy (Dofn). Our technique, different from conventional near-field scanning optical microscopy, probes optical forces originating from the interactions between the illuminated nanoparticle and the probe.