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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

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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...
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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Photoluminescence: Applications01:14

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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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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Enhancing spectroscopy and microscopy with emerging methods in photon correlation and quantum illumination.

Chieh Tsao1,2, Haonan Ling1,3, Alex Hinkle1

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Quantum optics advances enable new nanoscale characterization tools. Enhanced single-photon detectors and light sources drive progress in microscopy, spectroscopy, and metrology for materials science.

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Area of Science:

  • Quantum optics and its applications in nanoscale science.

Background:

  • Quantum optics has significantly improved the preparation and detection of correlations between individual photons.
  • Principles of quantum optics are increasingly applied to nanoscale characterization, enhancing spectroscopy, microscopy, and metrology.

Purpose of the Study:

  • To review the rapid progress in quantum optics for nanoscale characterization.
  • To highlight advancements in single-photon detectors and quantum-light sources.
  • To discuss emerging applications and future opportunities in materials science and bionanophotonics.

Main Methods:

  • Review of advanced technologies including time-resolved single-photon counting cameras and superconducting nanowire single-photon detectors.
  • Discussion of progress in entangled photon sources with increasing brightness.
  • Emphasis on applications such as super-resolution microscopy and photon-number-resolved spectroscopy.

Main Results:

  • Rapid progress driven by technological advancements in single-photon detection and quantum light generation.
  • Emerging applications demonstrating enhanced capabilities in microscopy, metrology, and materials characterization.
  • Development of powerful techniques like photon-number-resolved spectroscopy for nanoscale electronic materials.

Conclusions:

  • Key technological challenges and future opportunities exist in materials science and bionanophotonics.
  • Quantum optics provides a powerful paradigm for nanoscale characterization.
  • Continued advancements promise further breakthroughs in diverse scientific fields.