Počet záznamů: 1  

Direct measurement of the temperature profile close to an optically trapped absorbing particle

  1. 1.
    0464946 - UPT-D 2017 RIV US eng J - Článek v odborném periodiku
    Šiler, Martin - Ježek, Jan - Jákl, Petr - Pilát, Zdeněk - Zemánek, Pavel
    Direct measurement of the temperature profile close to an optically trapped absorbing particle.
    Optics Letters. Roč. 41, č. 5 (2016), s. 870-873. ISSN 0146-9592
    Grant CEP: GA ČR GPP205/12/P868
    Institucionální podpora: RVO:68081731
    Klíčová slova: gold nanoparticles * fluorescence * spectroscopy * tweezers
    Kód oboru RIV: BH - Optika, masery a lasery
    Impakt faktor: 3.416, rok: 2016

    surface temperature of an absorbing particle trapped in optical tweezers (OTs) is measured using a mixture of two fluorescent dyes. We analyze the dependence of temperature on both laser power and the radial distance from its surface, and we verify the 1/r decrease of temperature with increasing distance from the particle surface. We detect the variations of spectral profiles as the medium temperature changes. The temperature dependent signal, i.e., the ratio of summed intensities from two distinct spectral regions, is affected by the convolution of temperature profile with transfer function of the spectroscopic system. We analyze this effect and determine the temperature increase on the surface of a core-shell particle trapped by OTs.
    Trvalý link: http://hdl.handle.net/11104/0263683