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Proceedings Paper

Photothermal imaging of individual carbon nanofibers with optical microresonators
Author(s): Kevin D. Heylman; Kassandra A. Knapper; Erik H. Horak; Randall H. Goldsmith
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Paper Abstract

A new method is described for measuring the absorption of light by single non-emissive nanoparticles. Individual carbon nanofibers are imaged using a photonic transducer to quantify the heat dissipated after the electronic energy is thermalized. Leveraging the high sensitivity of ultrahigh-quality-factor optical microresonators as photothermal transducers provides high sensitivity. Polarization-resolved measurements indicate that the orientation of the absorption dipole of a nanofiber matches the long axis of the fiber. The per-atom absorption cross-section is determined to be (2.9 x 10-18 cm2 /carbon atom), in close agreement with the value for bulk graphite.

Paper Details

Date Published: 9 March 2015
PDF: 5 pages
Proc. SPIE 9331, Single Molecule Spectroscopy and Superresolution Imaging VIII, 93310G (9 March 2015); doi: 10.1117/12.2080056
Show Author Affiliations
Kevin D. Heylman, Univ. of Wisconsin-Madison (United States)
Kassandra A. Knapper, Univ. of Wisconsin-Madison (United States)
Erik H. Horak, Univ. of Wisconsin-Madison (United States)
Randall H. Goldsmith, Univ. of Wisconsin-Madison (United States)

Published in SPIE Proceedings Vol. 9331:
Single Molecule Spectroscopy and Superresolution Imaging VIII
Jörg Enderlein; Ingo Gregor; Zygmunt Karol Gryczynski; Rainer Erdmann; Felix Koberling, Editor(s)

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