Confocal surface plasmon microscopy with pupil function engineering

Bei Zhang, Suejit Pechprasarn, Jing Zhang, Michael Geoffrey Somekh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)


Surface Plasmon microscopy can measure local changes of refractive index on the micron scale. Interferometric plasmon imaging delivers quantitative high spatial resolution sensitive to refractive index. In addition the so called V (z) method allows image contrast to be controlled by varying the sample defocus without substantially degrading spatial resolution. Here, we show how a confocal system provides a simpler and more stable alternative. This system, however, places greater demands on the dynamic range of the system. We therefore use a spatial light modulator to engineer the microscope pupil function to suppress light that does not contribute to the signal.
Original languageEnglish
Pages (from-to)7388-7397
Number of pages10
JournalOptics Express
Issue number7
Publication statusPublished - 26 Mar 2012
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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