Polarization modulation thermal lens microscopy for imaging the orientation of non-spherical nanoparticles

Jing Zhang, Yu Huang, Chin Jung Chuang, Mariya Bivolarska, Chung W. See, Michael Geoffrey Somekh, Mark C. Pitter

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


In this paper a far field optical technique we call polarization modulation thermal lens microscopy (PM-TLM) is used for imaging the orientation and dichroism of non-spherical nanoparticles. In PM-TLM, the polarization state of a pump beam is periodically modulated which in turn causes morphology related intensity fluctuations in a continuous probe beam, thus allowing high signal to noise ratio detection with using lock-in amplification. Since PM-TLM uses nanoparticle absorption as the contrast mechanism, it may be used to detect and image nanoparticles of far smaller dimensions than can be observed by conventional dark field optical microscopy. The technique, its implementation and experiment results are presented.
Original languageEnglish
Pages (from-to)2643-2648
Number of pages6
JournalOptics Express
Issue number3
Publication statusPublished - 31 Jan 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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