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Proceedings Article

Near-field scanning optical microscopy imaging: theory, simulation, and experiment

[+] Author Affiliations
Garnett W. Bryant, Ansheng Liu

National Institute of Standards and Technology (USA)

Proc. SPIE 3609, Optical Pulse and Beam Propagation, 67 (June 23, 1999); doi:10.1117/12.351044
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From Conference Volume 3609

  • Optical Pulse and Beam Propagation
  • Yehuda B. Band
  • San Jose, CA | January 23, 1999

abstract

Near-field scanning optical microscopy (NSOM) is begin studied to achieve optical resolution much better than the diffraction limit. Improved resolution is realized when the sample is in the near field of the probe. Strong near-field coupling between sample and probe complicates image analysis. Experiments with well characterized tips and simple samples are needed to produce basic NSOM images. Detailed modeling able to reproduce imags and identify essential features in image formation is required. We analyze experimental NSOM transmission images of nanochannel glass arrays and of Au nanoparticles obtained in illumination mode. We use several approaches, including the discrete dipole method and the transfer matrix method, to simulate these images. Experimental and simulated images are compared to identify the contributions of tip-field structure, sample scattering, and the collection process to the images and to provide a clear interpretation of these NSOM images.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Garnett W. Bryant and Ansheng Liu
"Near-field scanning optical microscopy imaging: theory, simulation, and experiment", Proc. SPIE 3609, Optical Pulse and Beam Propagation, 67 (June 23, 1999); doi:10.1117/12.351044; http://dx.doi.org/10.1117/12.351044


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