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- Photo–Dember_effect abstract "In semiconductor physics, the photo–Dember effect (named after its discoverer Harry Dember) is the formation of a charge dipole in the vicinity of a semiconductor surface after ultra-fast photo-generation of charge carriers. The dipole forms owing to the difference of mobilities (or diffusion constants) for holes and electrons which combined with the break of symmetry provided by the surface lead to an effective charge separation in the direction perpendicular to the surface. In an isolated sample, where the macroscopic flow of an electric current is prohibited, the fast carriers (often the electrons) are slowed down and the slow carriers (often the holes) are accelerated by an electric field, called the Dember field.One of the main applications of the photo–Dember effect is the generation of terahertz (THz) radiation pulses for terahertz time-domain spectroscopy. This effect is present in most semiconductors but it is particularly strong in narrow-gap semiconductors (mainly arsenides and antimonides) such as InAs and InSb owing to their high electron mobility. The photo–Dember terahertz emission should not be confused with the surface field emission, which occurs if the surface energy bands of a semiconductor fall between its valence and conduction bands, which produces a phenomenon known as Fermi level pinning, causing, at its time, band bending and consequently the formation of a depletion or accumulation layer close to the surface which contributes to the acceleration of charge carriers. These two effects can contribute constructively or destructively for the dipole formation depending on the direction of the band-bending.".
- Photo–Dember_effect thumbnail PDanim.gif?width=300.
- Photo–Dember_effect wikiPageID "18466294".
- Photo–Dember_effect wikiPageLength "3806".
- Photo–Dember_effect wikiPageOutDegree "36".
- Photo–Dember_effect wikiPageRevisionID "679012992".
- Photo–Dember_effect wikiPageWikiLink Acceleration.
- Photo–Dember_effect wikiPageWikiLink Antimonide.
- Photo–Dember_effect wikiPageWikiLink Arsenide.
- Photo–Dember_effect wikiPageWikiLink Band_bending.
- Photo–Dember_effect wikiPageWikiLink Category:Optoelectronics.
- Photo–Dember_effect wikiPageWikiLink Category:Semiconductors.
- Photo–Dember_effect wikiPageWikiLink Category:Terahertz_technology.
- Photo–Dember_effect wikiPageWikiLink Charge_carrier.
- Photo–Dember_effect wikiPageWikiLink Charge_carriers.
- Photo–Dember_effect wikiPageWikiLink Charge_carriers_in_semiconductors.
- Photo–Dember_effect wikiPageWikiLink Depletion_region.
- Photo–Dember_effect wikiPageWikiLink Diffusion.
- Photo–Dember_effect wikiPageWikiLink Dipole.
- Photo–Dember_effect wikiPageWikiLink Electrical_conduction.
- Photo–Dember_effect wikiPageWikiLink Electrical_resistivity_and_conductivity.
- Photo–Dember_effect wikiPageWikiLink Electron.
- Photo–Dember_effect wikiPageWikiLink Electron_hole.
- Photo–Dember_effect wikiPageWikiLink Electron_mobility.
- Photo–Dember_effect wikiPageWikiLink Electronic_band_structure.
- Photo–Dember_effect wikiPageWikiLink Electrons.
- Photo–Dember_effect wikiPageWikiLink Energy_band.
- Photo–Dember_effect wikiPageWikiLink Fermi_level_pinning.
- Photo–Dember_effect wikiPageWikiLink Field_electron_emission.
- Photo–Dember_effect wikiPageWikiLink Field_emission.
- Photo–Dember_effect wikiPageWikiLink Indium_antimonide.
- Photo–Dember_effect wikiPageWikiLink Indium_arsenide.
- Photo–Dember_effect wikiPageWikiLink Metal–semiconductor_junction.
- Photo–Dember_effect wikiPageWikiLink Narrow-gap_semiconductor.
- Photo–Dember_effect wikiPageWikiLink Photoelectrochemical_process.
- Photo–Dember_effect wikiPageWikiLink Photoelectrochemical_processes.
- Photo–Dember_effect wikiPageWikiLink Physics.
- Photo–Dember_effect wikiPageWikiLink Radiation.
- Photo–Dember_effect wikiPageWikiLink Semiconductor.
- Photo–Dember_effect wikiPageWikiLink Symmetry_breaking.
- Photo–Dember_effect wikiPageWikiLink Terahertz.
- Photo–Dember_effect wikiPageWikiLink Terahertz_radiation.
- Photo–Dember_effect wikiPageWikiLink Terahertz_time-domain_spectroscopy.
- Photo–Dember_effect wikiPageWikiLink Valence_(chemistry).
- Photo–Dember_effect wikiPageWikiLink File:PDanim.gif.
- Photo–Dember_effect wikiPageWikiLinkText "Photo–Dember effect".
- Photo–Dember_effect hasPhotoCollection Photo–Dember_effect.
- Photo–Dember_effect wikiPageUsesTemplate Template:Reflist.
- Photo–Dember_effect subject Category:Optoelectronics.
- Photo–Dember_effect subject Category:Semiconductors.
- Photo–Dember_effect subject Category:Terahertz_technology.
- Photo–Dember_effect comment "In semiconductor physics, the photo–Dember effect (named after its discoverer Harry Dember) is the formation of a charge dipole in the vicinity of a semiconductor surface after ultra-fast photo-generation of charge carriers. The dipole forms owing to the difference of mobilities (or diffusion constants) for holes and electrons which combined with the break of symmetry provided by the surface lead to an effective charge separation in the direction perpendicular to the surface.".
- Photo–Dember_effect label "Photo–Dember effect".
- Photo–Dember_effect sameAs m.04f1g8t.
- Photo–Dember_effect sameAs Q15630226.
- Photo–Dember_effect sameAs Q15630226.
- Photo–Dember_effect sameAs 光登伯效应.
- Photo–Dember_effect wasDerivedFrom Photo–Dember_effect?oldid=679012992.
- Photo–Dember_effect depiction PDanim.gif.
- Photo–Dember_effect isPrimaryTopicOf Photo–Dember_effect.