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Related Experiment Videos

Two-photon fluorescence surface wave microscopy.

J Y L Goh1, M G Somekh, C W See

  • 1Applied Optics Group, School of Electrical and Electronic Engineering, University Park, Nottingham NG7 2RD, UK. eexjg@nottingham.ac.uk

Journal of Microscopy
|December 21, 2005
PubMed
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This study introduces two-photon surface wave microscopy for biological imaging. The technique utilizes enhanced surface waves for improved resolution, showing potential for advanced microscopy applications.

Area of Science:

  • Optics and Photonics
  • Microscopy
  • Biophysics

Background:

  • Traditional optical microscopy faces limitations in resolution and signal-to-noise ratio for biological samples.
  • Two-photon excitation offers advantages like reduced photobleaching and deeper penetration but requires high illumination intensity.
  • Surface wave phenomena can lead to significant localized field enhancements, potentially improving excitation efficiency.

Purpose of the Study:

  • To demonstrate the principle and potential applications of two-photon surface wave microscopy for biological samples.
  • To investigate the use of specially prepared coverslips for supporting surface wave propagation and field enhancement.
  • To optimize beam conditioning for efficient illumination in the two-photon surface wave microscopy setup.

Main Methods:

Related Experiment Videos

  • Development of a modified scanning optical microscope.
  • Design of specialized coverslips to support surface wave propagation.
  • Implementation of beam conditioning techniques for efficient illumination.
  • Demonstration of two-photon surface wave fluorescent excitation using fluorescent nanospheres.

Main Results:

  • Successful demonstration of two-photon surface wave fluorescent excitation.
  • Achieved a point spread function width of approximately 220 nm at 925 nm illumination wavelength.
  • Confirmed significant field enhancements due to surface wave propagation on specially prepared coverslips.

Conclusions:

  • Two-photon surface wave microscopy is a viable technique for high-resolution imaging of biological samples.
  • The developed method offers enhanced fluorescent excitation through surface wave field amplification.
  • This approach holds promise for advanced fluorescence and harmonic imaging microscopy applications.