Abstract：
:Heating on the microscale using focused lasers gave rise to recent applications, e.g., in biomedicine, biology and microfluidics, especially using gold nanoparticles as efficient nanoabsorbers of light. However, such an approach naturally leads to nonuniform, Gaussian-like temperature distributions due to the diffusive nature of heat. Here, we report on an experimental means to generate arbitrary distributions of temperature profiles on the micrometric scale (e.g. uniform, linear, parabolic, etc) consisting in illuminating a uniform gold nanoparticle distribution on a planar substrate using spatially contrasted laser beams, shaped using a spatial light modulator (SLM). We explain how to compute the light pattern and the SLM interferogram to achieve the desired temperature distribution, and demonstrate the approach by carrying out temperature measurements using quantitative wavefront sensing.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Durdevic L,Robert HML,Wattellier B,Monneret S,Baffou Gdoi
10.1038/s41598-019-40382-3subject
Has Abstractpub_date
2019-03-15 00:00:00pages
4644issue
1issn
2045-2322pii
10.1038/s41598-019-40382-3journal_volume
9pub_type
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