Download e-book for kindle: Electro-optic and Photorefractive Materials: Proceedings of by P. Günter (auth.), Professor Dr. Peter Günter (eds.)

By P. Günter (auth.), Professor Dr. Peter Günter (eds.)

ISBN-10: 3642719074

ISBN-13: 9783642719073

ISBN-10: 3642719090

ISBN-13: 9783642719097

This quantity is predicated on lectures and contributed papers provided on the 11th process the foreign institution of fabrics technology and Tech­ nology that used to be held in Erice, Sicily, Italy on the Ettore Majorana heart for medical tradition in the course of the interval 6-17 July 1986. the topic of the direction used to be "Electro-optic and Photorefractive fabrics: functions in Sig­ nal Processing and part Conjugation" . The fields of electro-optics and photorefraction have constructed quickly because the invention of lasers simply over twenty-five years in the past. The possibil­ of changing the optical homes of a cloth through electrical fields or by means of ity optical waves is of significant significance for either natural technology and for useful functions similar to optical sign processing, telecommunications and opti­ cal exhibit units. those results let us manage (modulate, deflect) and method a given gentle wave. Modulation, deflection and processing of sunshine waves via the electro-optic impression is of basic value in fiber optic telecommuniC1. tions and sensor platforms w right here the sunshine indications should be processed past or next to transmission during the fibers. skinny movie electro-optic fabrics with appropriate electrode arrays on· the outside of the wave-guiding constructions bring about a expertise sometimes called inte­ grated optics. In precept, built-in optics units let miniaturization and integration of many operations onto a unmarried chip. The photorefractive impression, outlined as a photo-induced switch of the in­ dices of refraction, used to be the opposite subject taken care of during this course.

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Additional info for Electro-optic and Photorefractive Materials: Proceedings of the International School on Material Science and Technology, Erice, Italy, July 6–17, 1986

Example text

BaTi03 1461, LiTa03 14/1 and PbTi0314B1. Very precise data have been taken for KOP 1161; here in the F-phase a morphic component d3tl arises whose temperature dependence may be sought in the G-phase invariant PtP so that we expect d311 (T~3s(T)· This is indeed valid as shown experimentally a linear dependence of d311 on spontaneous birefringence, which is itself proportional to Ps 1161. For ferroelectrics which are not proper we cannot expect Osdijk - Ps to be automatically fulfilled since Ps itself may not be proportional to 1) .

WIDE GAP SEMICONDUCTOR LAYERS CONDUCTION BAND VALENCE BAND NARROW GAP SEMICONDUCTOR LAYER Fig. 1. Energy structure and singleparticle wave functions for a simple quantum well, showing two confined states in the conduction and valence bands (not to scale). Other material systems can be used to grow quantum wells, although their growth is usually more difficult. InGaAs/InAlAs and InGaAs/lnP quantum wells can be grown lattice-matched to InP substrates, and GaSb/GaAlSb can be grown on GaSb. g. 5 /-1m) as opposed to - 850 nm for GaAs/GaAlAs, although their physics so far seems to scale well from the GaAs/GaAlAs case.

2) . The G-phase sYlT111etry allows for an invariant PlPlP311 so that d113(T) 1531 is a measure of 11s(T). The same is true for the dIll coefficient of quartz (G = 622, F = 32, belongs to Bl representation) 1541. The methods for SHG measurements can be made very sensitive even for powdered samples and can therefore serve as a test for detection of non-centrosymmetry 1551 . Measurements on powdered phenanthrene 1551 prove the existence of a SPT with a loss of the center of symmetry, probably of a pseudoproper ferroelectric nature.

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Electro-optic and Photorefractive Materials: Proceedings of the International School on Material Science and Technology, Erice, Italy, July 6–17, 1986 by P. Günter (auth.), Professor Dr. Peter Günter (eds.)

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