Near-field ablation threshold of cellular samples at mid-IR wavelengths

Details Near-field ablation threshold of cellular samples at mid-IR wavelengths Near-field ablation threshold of cellular samples at mid-IR wavelengths

2012-01-24

arxiv.org/abs/1201.4980v1

Physics

Biological Physics

8 pages, 3 figures

Scientific paper

We report the near-field ablation of material from cellulose acetate coverslips in water and my- oblast cell samples in growth media, with a spot size as small as 1.5 {\mu}m under 3 {\mu}m wavelength radiation. The power dependence of the ablation process has been studied and comparisons have been made to models of photomechanical and plasma-induced ablation. The ablation mechanism is mainly dependent on the acoustic relaxation time and optical properties of the materials. We find that for all near-field experiments, the ablation thresholds are very high, pointing to plasma-induced ablation as the dominant mechanism.

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