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Related Concept Videos

Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...

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Related Experiment Video

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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Surface plasmon microscopic sensing with beam profile modulation.

Bei Zhang1, Suejit Pechprasarn, Michael G Somekh

  • 1Institute of Imaging and Optical Science (IBIOS), University of Nottingham, Nottingham NG7 2RD, UK.

Optics Express
|December 25, 2012
PubMed
Summary
This summary is machine-generated.

Surface Plasmon microscopy with a phase spatial light modulator offers enhanced refractive index measurement. This advanced technique improves resolution and signal without mechanical sample movement.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Surface Plasmon microscopy is a technique for measuring local refractive index with high resolution.
  • Conventional methods using prism-based systems or V(z) curves have limitations in resolution and experimental flexibility.
  • Understanding surface plasmon propagation velocity is crucial for various applications.

Purpose of the Study:

  • To demonstrate the application of a phase spatial light modulator (SLM) in Surface Plasmon microscopy.
  • To enhance the capabilities of Surface Plasmon microscopy for refractive index measurement.
  • To introduce novel functionalities for improved resolution and signal detection.

Main Methods:

  • Utilizing an interferometric or confocal Surface Plasmon microscopy setup.
  • Implementing a phase spatial light modulator for pupil function apodization.
  • Employing the SLM to introduce angular varying phase shifts, simulating sample defocus.
  • Modulating the relative phase between the surface plasmon and reference beams.

Main Results:

  • Achieved measurement of local refractive index on a far finer scale compared to prism-based systems.
  • Demonstrated effective sample defocus simulation without mechanical movement using the SLM.
  • Obtained significant signal enhancement through controlled phase manipulation.
  • Successfully performed pupil function apodization using the phase SLM.

Conclusions:

  • Phase spatial light modulators significantly enhance Surface Plasmon microscopy capabilities.
  • The developed method provides superior refractive index measurement resolution and experimental control.
  • This approach offers a versatile platform for advanced optical microscopy techniques.