Photothermal laser material interactions - From the sledgehammer to nano-GPS

Jonathan Hobley, David Paramelle, Paul Free, David G. Fernig, Shinji Kajimoto, Sergey Gorelik

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this chapter we will summarize the main photothermal, photoacoustic and photomechanical effects of coupling a laser beam into a material from the absorption of the laser light to the deactivation of vibrationally and electronically excited states. Some methods to estimate the resulting temperature rise will be discussed and the resulting pressure increase in the heated area explained. The relaxation of both pressure and thermal transients will be explored and several methods described, such as pump-probe spectroscopy and imaging techniques, which can be used to investigate the dynamics of the relaxation pathways. We will explain how photothermal effects can manifest as optical effects. Finally, we will describe how we can harness photothermally induced optical changes to provide a new methodology in bioimaging involving indestructible 5-10 nm noble metal nanoparticles that can be observed using photothermal tracking microscopy for unprecedented periods of time in live cell imaging.

Original languageEnglish
Title of host publicationAdvances in Bio-Imaging
Subtitle of host publicationFrom Physics to Signal Understanding Issues: State-of-the-Art and Challenges
EditorsNicolas Lomenie, Daniel Racoceanu, Alexandre Gouaillard
Number of pages27
Publication statusPublished - 2012 Feb 1
Externally publishedYes

Publication series

NameAdvances in Intelligent and Soft Computing
ISSN (Print)1867-5662

ASJC Scopus subject areas

  • Computer Science(all)


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