Abstract

The photo-thermal effects of plasmonic nanoparticles are promising for cancer therapies. These treatments would greatly benefit from real-time, multi-scale temperature mapping by non-invasive means. Here we show that intense terahertz time domain spectroscopy can be used as a non-contact and high-resolution thermometer of water solutions. Using this technique, we measure the temperature change, triggered by femtosecond amplified laser pulses, of a solution of gold nanospheres in water. Extensions of this ultra-fast and non-invasive technique could open the door to real-time micro-thermometry of single cells without fluorescent labels.

© 2016 Optical Society of America

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