Applications of single-beam photothermal analysis
نویسندگان
چکیده
منابع مشابه
Gaussian beam photothermal single particle microscopy.
We explore the intuitive lensing picture of laser-heated nanoparticles occurring in single particle photothermal (PT) microscopy. The effective focal length of the thermal lens (TL) is derived from a ray-optics treatment and used to transform the probing focused Gaussian beam with ABCD Gaussian matrix optics. The relative PT signal is obtained from the relative beam-waist change far from the TL...
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Photothermal radiometry has been proved being a versatile tool for the non-contact and non-destructive material inspection in near-surface zones. Although these near-surface areas represent only a few percent of the workpiece’s volume, they influence significantly its quality, functional behaviour, reliability and life time. In particular, they determine decisively the mechanical properties of ...
متن کاملA systematic analysis of the influence of the surrounding media in the photothermal beam deflection signal
The photothermal beam deflection (PDS) technique was tested for low thermal diffusivity materials. The effect of using different liquids as surrounding media was studied in a systematic way. The fundamental experimental parameters, like the pump beam power and the modulation frequency were also studied in order to find out the best combination that still allows us to get good signals. Due to th...
متن کاملPhotothermal single particle Rutherford scattering microscopy.
We demonstrate that the quantum-mechanical description of Rutherford scattering has a photonic counterpart in a new form of single particle photothermal microscopy. Using a split detector we provide experimental evidence that photons are deflected by a photothermal potential that is created by a local refractive index change around a heated nanoparticle. The deflection experienced is shown to b...
متن کاملSingle-particle absorption spectroscopy by photothermal contrast.
Removing effects of sample heterogeneity through single-molecule and single-particle techniques has advanced many fields. While background free luminescence and scattering spectroscopy is widely used, recording the absorption spectrum only is rather difficult. Here we present an approach capable of recording pure absorption spectra of individual nanostructures. We demonstrate the implementation...
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ژورنال
عنوان ژورنال: Le Journal de Physique IV
سال: 1994
ISSN: 1155-4339
DOI: 10.1051/jp4:1994707