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- Second-harmonic_generation abstract "Second harmonic generation (also called frequency doubling or abbreviated SHG) is a nonlinear optical process, in which photons with the same frequency interacting with a nonlinear material are effectively "combined" to generate new photons with twice the energy, and therefore twice the frequency and half the wavelength of the initial photons. Second harmonic generation, as an even-order nonlinear optical effect, is only allowed in mediums without inversion symmetry. It is a special case of sum frequency generation.Second harmonic generation was first demonstrated by Peter Franken, A. E. Hill, C. W. Peters, and G. Weinreich at the University of Michigan, Ann Arbor, in 1961. The demonstration was made possible by the invention of the laser, which created the required high intensity monochromatic light. They focused a ruby laser with a wavelength of 694 nm into a quartz sample. They sent the output light through a spectrometer, recording the spectrum on photographic paper, which indicated the production of light at 347 nm. Famously, when published in the journal Physical Review Letters, the copy editor mistook the dim spot (at 347 nm) on the photographic paper as a speck of dirt and removed it from the publication. The formulation of SHG was initially described by N. Bloembergen and P. S. Pershan at Harvard in 1962. In their extensive evaluation of Maxwell's equations at the planar interface between a linear and nonlinear medium, several rules for the interaction of light in non-linear mediums were elucidated.Generating the second harmonic, often called frequency doubling, is also a process in radio communication; it was developed early in the 20th century, and has been used with frequencies in the megahertz range. It is a special case of frequency multiplication.".
- Second-harmonic_generation thumbnail Energy_level_scheme_of_SHG.png?width=300.
- Second-harmonic_generation wikiPageExternalLink frequency_doubling.html.
- Second-harmonic_generation wikiPageID "7334318".
- Second-harmonic_generation wikiPageRevisionID "598208621".
- Second-harmonic_generation hasPhotoCollection Second-harmonic_generation.
- Second-harmonic_generation subject Category:Nonlinear_optics.
- Second-harmonic_generation subject Category:Second-harmonic_generation.
- Second-harmonic_generation type BodyPart105220461.
- Second-harmonic_generation type Eye105311054.
- Second-harmonic_generation type NonlinearOptics.
- Second-harmonic_generation type Organ105297523.
- Second-harmonic_generation type Part109385911.
- Second-harmonic_generation type PhysicalEntity100001930.
- Second-harmonic_generation type SenseOrgan105299178.
- Second-harmonic_generation type Thing100002452.
- Second-harmonic_generation comment "Second harmonic generation (also called frequency doubling or abbreviated SHG) is a nonlinear optical process, in which photons with the same frequency interacting with a nonlinear material are effectively "combined" to generate new photons with twice the energy, and therefore twice the frequency and half the wavelength of the initial photons. Second harmonic generation, as an even-order nonlinear optical effect, is only allowed in mediums without inversion symmetry.".
- Second-harmonic_generation label "Frequenzverdopplung".
- Second-harmonic_generation label "Generacja drugiej harmonicznej".
- Second-harmonic_generation label "Génération de seconde harmonique".
- Second-harmonic_generation label "Second-harmonic generation".
- Second-harmonic_generation label "Генерация второй оптической гармоники".
- Second-harmonic_generation label "第二次高調波発生".
- Second-harmonic_generation sameAs Frequenzverdopplung.
- Second-harmonic_generation sameAs Génération_de_seconde_harmonique.
- Second-harmonic_generation sameAs 第二次高調波発生.
- Second-harmonic_generation sameAs Generacja_drugiej_harmonicznej.
- Second-harmonic_generation sameAs m.025zhmk.
- Second-harmonic_generation sameAs Q1455635.
- Second-harmonic_generation sameAs Q1455635.
- Second-harmonic_generation sameAs Second-harmonic_generation.
- Second-harmonic_generation wasDerivedFrom Second-harmonic_generation?oldid=598208621.
- Second-harmonic_generation depiction Energy_level_scheme_of_SHG.png.
- Second-harmonic_generation isPrimaryTopicOf Second-harmonic_generation.
