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Proceedings Paper

Optical temperature mapping around plasmonic structures using directional anisotropy in fluorescence
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Paper Abstract

Optically measuring temperature fields around plasmonic structures is of great importance for their thermal management considering the strong energy dissipations along with the extraordinary abilities of light coupling. Among all the available methods, ratiometric studies are particularly desirable since they suppress the influence of trivial factors, such as temporal fluctuations in excitation and spatial non-uniform distributions of fluorescent species, and thus gives reliable temperature dependence. Here we report a new ratiometric thermometry that simultaneously captures the fluorescence images of different numerical apertures (NAs) to resolve the temperature-dependent orientations of emission dipoles. This thermometry measures fluorescent anisotropy based on the directionality of emission. We show that this thermometry can be used to measure temperature near metallic surfaces. We foresee it to trigger interests of a large community who desire simultaneous thermal characterization along with the optical imaging. Moreover, it brings out a general idea to simplify ratiometric setups if inequalities exist on the excitation side, which may reach for a larger number of researchers.

Paper Details

Date Published: 29 August 2017
PDF: 5 pages
Proc. SPIE 10353, Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2017, 103530P (29 August 2017); doi: 10.1117/12.2273535
Show Author Affiliations
Chen Chen, Purdue Univ. (United States)
Zhidong Du, Purdue Univ. (United States)
Liang Pan, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 10353:
Optical Sensing, Imaging, and Photon Counting: Nanostructured Devices and Applications 2017
Manijeh Razeghi; Oleg Mitrofanov; José Luis Pau Vizcaíno; Chee Hing Tan, Editor(s)

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