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• Cathodoluminescence abstract "Cathodoluminescence is an optical and electromagnetic phenomenon in which electrons impacting on a luminescent material such as a phosphor, cause the emission of photons which may have wavelengths in the visible spectrum. A familiar example is the generation of light by an electron beam scanning the phosphor-coated inner surface of the screen of a television that uses a cathode ray tube. Cathodoluminescence is the inverse of the photoelectric effect in which electron emission is induced by irradiation with photons. Cathodoluminescence occurs because the impingement of a high energy electron beam onto a semiconductor will result in the promotion of electrons from the valence band into the conduction band, leaving behind a hole. When an electron and a hole recombine, it is possible for a photon to be emitted. The energy (color) of the photon, and the probability that a photon and not a phonon will be emitted, depends on the material, its purity, and its defect state. In this case, the "semiconductor" examined can, in fact, be almost any non-metallic material. In terms of band structure, classical semiconductors, insulators, ceramics, gemstones, minerals, and glasses can be treated the same way.In geology, mineralogy, materials science and semiconductor engineering, a scanning electron microscope fitted with a cathodoluminescence detector, or an optical cathodoluminescence microscope, may be used to examine internal structures of semiconductors, rocks, ceramics, glass, etc. in order to get information on the composition, growth and quality of the material. In these instruments a focused beam of electrons impinges on a sample and induces it to emit light that is collected by an optical system, such as an elliptical mirror. From there, a fiber optic will transfer the light out of the microscope where it is separated into its component wavelengths by a monochromator and is then detected with a photomultiplier tube. By scanning the microscope's beam in an X-Y pattern and measuring the light emitted with the beam at each point, a map of the optical activity of the specimen can be obtained. The primary advantages to the electron microscope based technique is the ability to resolve features down to 1 nanometer, the ability to measure an entire spectrum at each point (hyperspectral imaging) if the photomultiplier tube is replaced with a CCD camera, and the ability to perform nanosecond- to picosecond-level time-resolved measurements if the electron beam can be "chopped" into nano- or pico-second pulses. Moreover, the optical properties of an object can be correlated to structural properties observed with the electron microscope. These advanced techniques are useful for examining low-dimensional semiconductor structures, such a quantum wells or quantum dots. Although direct bandgap semiconductors such as GaAs or GaN are most easily examined by these techniques, indirect semiconductors such as silicon also emit weak cathodoluminescence, and can be examined as well. In particular, the luminescence of dislocated silicon is different from intrinsic silicon, and can be used to map defects in integrated circuits.Recently, cathodoluminescence performed in electron microscopes is being used to study Surface plasmon resonance in metallic Nanoparticles. Indeed, metallic nanoparticles can absorb and emit visible light because of surface Plasmons.Cathodoluminescence has been exploited as a probe to map the local density of states of planar dielectric photonic crystals and nanostructured photonic materials.Although an electron microscope with a cathodoluminescence detector provides high magnification and resolution it is more complicated and expensive compared to an easy to use optical cathodoluminescence microscope which benefits from its ability to show actual visible color features directly through the eyepiece. Some systems combine both an optical and an electron microscope to take advantage of both these techniques.".
• Cathodoluminescence wikiPageExternalLink index.html.
• Cathodoluminescence wikiPageExternalLink highrescathodoluminescence.
• Cathodoluminescence wikiPageExternalLink cath_intro.html.
• Cathodoluminescence wikiPageExternalLink www.attolight.com.
• Cathodoluminescence wikiPageID "61275".
• Cathodoluminescence wikiPageLength "6309".
• Cathodoluminescence wikiPageOutDegree "48".
• Cathodoluminescence wikiPageRevisionID "669536789".
• Cathodoluminescence wikiPageWikiLink Band_structure.
• Cathodoluminescence wikiPageWikiLink CCD_camera.
• Cathodoluminescence wikiPageWikiLink Category:Electron_beam.
• Cathodoluminescence wikiPageWikiLink Category:Light_sources.
• Cathodoluminescence wikiPageWikiLink Category:Luminescence.
• Cathodoluminescence wikiPageWikiLink Category:Materials_science.
• Cathodoluminescence wikiPageWikiLink Category:Scientific_techniques.
• Cathodoluminescence wikiPageWikiLink Cathode_ray_tube.
• Cathodoluminescence wikiPageWikiLink Cathodoluminescence_microscope.
• Cathodoluminescence wikiPageWikiLink Ceramic.
• Cathodoluminescence wikiPageWikiLink Charge-coupled_device.
• Cathodoluminescence wikiPageWikiLink Conduction_band.
• Cathodoluminescence wikiPageWikiLink Direct_and_indirect_band_gaps.
• Cathodoluminescence wikiPageWikiLink Direct_bandgap.
• Cathodoluminescence wikiPageWikiLink Dislocation.
• Cathodoluminescence wikiPageWikiLink Electromagnetism.
• Cathodoluminescence wikiPageWikiLink Electron.
• Cathodoluminescence wikiPageWikiLink Electron_hole.
• Cathodoluminescence wikiPageWikiLink Electronic_band_structure.
• Cathodoluminescence wikiPageWikiLink Electrons.
• Cathodoluminescence wikiPageWikiLink GaAs.
• Cathodoluminescence wikiPageWikiLink GaN.
• Cathodoluminescence wikiPageWikiLink Gallium_arsenide.
• Cathodoluminescence wikiPageWikiLink Gallium_nitride.
• Cathodoluminescence wikiPageWikiLink Geology.
• Cathodoluminescence wikiPageWikiLink Glass.
• Cathodoluminescence wikiPageWikiLink Hyperspectral_imaging.
• Cathodoluminescence wikiPageWikiLink Integrated_circuit.
• Cathodoluminescence wikiPageWikiLink Integrated_circuits.
• Cathodoluminescence wikiPageWikiLink Luminescence.
• Cathodoluminescence wikiPageWikiLink Materials_science.
• Cathodoluminescence wikiPageWikiLink Materials_science_and_engineering.
• Cathodoluminescence wikiPageWikiLink Mineralogy.
• Cathodoluminescence wikiPageWikiLink Monochromator.
• Cathodoluminescence wikiPageWikiLink Nanoparticle.
• Cathodoluminescence wikiPageWikiLink Nanoparticles.
• Cathodoluminescence wikiPageWikiLink Optical_fiber.
• Cathodoluminescence wikiPageWikiLink Optical_phenomena.
• Cathodoluminescence wikiPageWikiLink Optical_phenomenon.
• Cathodoluminescence wikiPageWikiLink Phonon.
• Cathodoluminescence wikiPageWikiLink Phosphor.
• Cathodoluminescence wikiPageWikiLink Photoelectric_effect.
• Cathodoluminescence wikiPageWikiLink Photomultiplier.
• Cathodoluminescence wikiPageWikiLink Photon.
• Cathodoluminescence wikiPageWikiLink Photonic_crystal.
• Cathodoluminescence wikiPageWikiLink Photonic_crystals.
• Cathodoluminescence wikiPageWikiLink Photons.
• Cathodoluminescence wikiPageWikiLink Plasmon.
• Cathodoluminescence wikiPageWikiLink Quantum_dot.
• Cathodoluminescence wikiPageWikiLink Quantum_dots.
• Cathodoluminescence wikiPageWikiLink Quantum_well.
• Cathodoluminescence wikiPageWikiLink Scanning_electron_microscope.
• Cathodoluminescence wikiPageWikiLink Semiconductor.
• Cathodoluminescence wikiPageWikiLink Silicon.
• Cathodoluminescence wikiPageWikiLink Spectrum.
• Cathodoluminescence wikiPageWikiLink Surface_plasmon_resonance.
• Cathodoluminescence wikiPageWikiLink Television.
• Cathodoluminescence wikiPageWikiLink Valence_and_conduction_bands.
• Cathodoluminescence wikiPageWikiLink Valence_band.
• Cathodoluminescence wikiPageWikiLink Visible_spectrum.
• Cathodoluminescence wikiPageWikiLinkText "Cathodoluminescence".
• Cathodoluminescence wikiPageWikiLinkText "cathodoluminescence".
• Cathodoluminescence hasPhotoCollection Cathodoluminescence.
• Cathodoluminescence wikiPageUsesTemplate Template:Reflist.
• Cathodoluminescence subject Category:Electron_beam.
• Cathodoluminescence subject Category:Light_sources.
• Cathodoluminescence subject Category:Luminescence.
• Cathodoluminescence subject Category:Materials_science.
• Cathodoluminescence subject Category:Scientific_techniques.
• Cathodoluminescence hypernym Phenomenon.
• Cathodoluminescence type Disease.
• Cathodoluminescence type Physic.
• Cathodoluminescence type Source.
• Cathodoluminescence type Technique.
• Cathodoluminescence comment "Cathodoluminescence is an optical and electromagnetic phenomenon in which electrons impacting on a luminescent material such as a phosphor, cause the emission of photons which may have wavelengths in the visible spectrum. A familiar example is the generation of light by an electron beam scanning the phosphor-coated inner surface of the screen of a television that uses a cathode ray tube.".
• Cathodoluminescence label "Cathodoluminescence".
• Cathodoluminescence sameAs Katodoluminiscence.
• Cathodoluminescence sameAs Kathodolumineszenz.
• Cathodoluminescence sameAs کاتدتابناکی.
• Cathodoluminescence sameAs Cathodoluminescence.
• Cathodoluminescence sameAs Katódlumineszcencia.
• Cathodoluminescence sameAs Catodoluminescenza.
• Cathodoluminescence sameAs カソードルミネッセンス.
• Cathodoluminescence sameAs Катодолюминесценция.
• Cathodoluminescence sameAs Katodluminiscence.
• Cathodoluminescence sameAs Katodoluminescencja.
• Cathodoluminescence sameAs m.0gm8t.
• Cathodoluminescence sameAs Катодолюминесценция.
• Cathodoluminescence sameAs Q369794.
• Cathodoluminescence sameAs Q369794.
• Cathodoluminescence wasDerivedFrom Cathodoluminescence?oldid=669536789.

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