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Light craft: creating unusual properties in glass with light

Light craft: creating unusual properties in glass with light
Light craft: creating unusual properties in glass with light
Glass dominates modern optical technologies. Nonlinear optical processes, such as second-harmonic generation and parametric frequency conversion, are technological very attractive and require a second-order optical nonlinearity - a χ(2), which is normally absent in glass owing to its inversion symmetry. Thus, when light-induced frequency doubling was first discovered wide-ranging studies ensued into the mechanism and properties of this unexpected phenomenon. The mystery of self-organized χ(2) gratings was finally solved on the basis of a new physical phenomenon - the coherent photogalvanic effect, consisting in quantum interference between light fields at two different frequencies, ω and 2ω, which excites a phase dependent current (coherent photocurrent). Coherent photocurrent creates quasi-phase matching χ(2) gratings. Moreover in the experiments on electric-field second harmonic generation in optical fibres the first evidence of phase dependent modulation of a total cross-section of ionization due to quantum interference (coherent photoconductivity) in solid state materials has been obtained.
Kazansky, P.G.
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Kazansky, P.G.
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Kazansky, P.G. (2004) Light craft: creating unusual properties in glass with light. Photon Craft International Co-operative Project Symposium, Kyoto, Japan. 24 Sep 2004.

Record type: Conference or Workshop Item (Other)

Abstract

Glass dominates modern optical technologies. Nonlinear optical processes, such as second-harmonic generation and parametric frequency conversion, are technological very attractive and require a second-order optical nonlinearity - a χ(2), which is normally absent in glass owing to its inversion symmetry. Thus, when light-induced frequency doubling was first discovered wide-ranging studies ensued into the mechanism and properties of this unexpected phenomenon. The mystery of self-organized χ(2) gratings was finally solved on the basis of a new physical phenomenon - the coherent photogalvanic effect, consisting in quantum interference between light fields at two different frequencies, ω and 2ω, which excites a phase dependent current (coherent photocurrent). Coherent photocurrent creates quasi-phase matching χ(2) gratings. Moreover in the experiments on electric-field second harmonic generation in optical fibres the first evidence of phase dependent modulation of a total cross-section of ionization due to quantum interference (coherent photoconductivity) in solid state materials has been obtained.

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Published date: September 2004
Venue - Dates: Photon Craft International Co-operative Project Symposium, Kyoto, Japan, 2004-09-24 - 2004-09-24

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Local EPrints ID: 54060
URI: http://eprints.soton.ac.uk/id/eprint/54060
PURE UUID: ec224875-56bf-4592-8381-8732e2d70751

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Date deposited: 11 Aug 2008
Last modified: 15 Mar 2024 10:44

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Author: P.G. Kazansky

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