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Optical Engineering

Photothermal imaging of nanoparticles beyond the diffraction limit
Author(s): Chi Lok Wong; Beng Koon Ng; Srivathsan Vasudevan; George Chung-Kit Chen; Shuchi Agarwal; Peng Chen; Nolang Fanani; Zhiping Lin
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Paper Abstract

In this paper, a full-field photothermal imaging technique, which does not require a time consuming scan as used in the conventional photothermal imaging system, is reported. Imaging on gold nanoparticles (70 nm) and a blue polystyrene bead (193 nm) were conducted and the experimental results demonstrate the visualization ability of the photothermal imaging technique on nanotargets that are below the diffraction limit. The photothermal imaging system can be operated in an ambient environment where vacuum is not required.

Paper Details

Date Published: 1 July 2011
PDF: 6 pages
Opt. Eng. 50(7) 073201 doi: 10.1117/1.3600422
Published in: Optical Engineering Volume 50, Issue 7
Show Author Affiliations
Chi Lok Wong, Nanyang Technological Univ. (Singapore)
Beng Koon Ng, Nanyang Technological Univ. (Singapore)
Srivathsan Vasudevan, Nanyang Technological Univ. (Singapore)
George Chung-Kit Chen, BC Photonics Technological Co. (Canada)
Shuchi Agarwal, Nanyang Technological Univ. (Singapore)
Peng Chen, Nanyang Technological Univ. (Singapore)
Nolang Fanani, Nanyang Technological Univ. (Singapore)
Zhiping Lin, Nanyang Technological Univ. (Singapore)


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