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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400 keV in...

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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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THz emission microscopy with sub-wavelength broadband source.

Romain Lecaque1, Samuel Grésillon, Claude Boccara

  • 1Laboratoire Photons Et Matière, UPR5 CNRS and University P. et M. Curie-ESPCI, 10 rue Vauquelin 75231, Paris Cedex 05, France.

Optics Express
|June 11, 2008
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A new terahertz/infrared (THz/IR) near-field microscope achieves subwavelength resolution, surpassing lambda/10. This advancement utilizes Mie scattering and deconvolution for enhanced THz/IR imaging.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Materials Science

Background:

  • Terahertz (THz) and Infrared (IR) imaging offer unique material characterization capabilities.
  • Achieving subwavelength resolution in THz/IR microscopy has been a significant challenge.
  • Near-field techniques are crucial for overcoming the diffraction limit in optical microscopy.

Purpose of the Study:

  • To demonstrate a versatile near-field microscope operating in the THz/IR spectrum.
  • To achieve and quantify subwavelength resolution in THz/IR imaging.
  • To elucidate the contrast mechanism and improve image resolution through advanced processing.

Main Methods:

  • Development of a THz/IR near-field microscope utilizing a subwavelength source.
  • Collection and analysis of scattered light from the sample.
  • Application of a Mie scattering diffraction model to explain image contrast.
  • Implementation of deconvolution algorithms for resolution enhancement.

Main Results:

  • Demonstration of a versatile THz/IR near-field microscope.
  • Achieved imaging resolution better than lambda/10.
  • Validated the Mie scattering diffraction model for contrast origin.
  • Successfully improved THz/IR image resolution via deconvolution.

Conclusions:

  • The developed THz/IR near-field microscope offers a powerful tool for subwavelength imaging.
  • Mie scattering provides a physical basis for contrast in this near-field system.
  • Deconvolution is an effective post-processing method to further enhance resolution in classical near-field microscopy.