DocumentCode :
2367850
Title :
Electronic Polarizabilities of ions in Lithium Tantalate (LiTa03) optical wave guide from natural birefringence data
Author :
Chunduru, Vardhani ; Ethiraj, R.
Author_Institution :
Dept. of Phys., Osmania Univ., Hyderabad
fYear :
2008
fDate :
24-27 March 2008
Firstpage :
636
Lastpage :
640
Abstract :
The ever increasing demand in the field of signal processing, computing and communication has ushered in integrated devices in optical systems. Several materials have been used for fabricating optical waveguides, components and devices adopting a variety of techniques. However, among the many device materials, lithium Tantalate remains one of the prime candidates owing to its excellent piezo electric, Electro-optical and waveguiding properties. The active and passive structures of dielectrics also include two dimensional optical waveguides. The field of integrated optics is primarily based on the fact that light can be guided and coupled in very thin films of transparent materials on suitable substrates. - optical waveguides in lithium tantalate crystal form the basis of many integrated optical devices. In characterising these devices the refractive index is an important parameter and understanding of this parameter from atomic point of view is very essential . since RI is due to dipole moments of ions it can be expressed in terms of polarizabilities of the ions and electric field. The electronic polarizabilities of ions in lithium tantalate (LiTaO3) crystals are evaluated from the data on the natural birefringence of these crystals. An accurate calculation of electronic polarizabilities of ions is indispensable in the understanding of problems regarding the piezo -optical and electro-optical behaviour of these crystals.
Keywords :
birefringence; crystals; dielectric properties; electric fields; electro-optical devices; lithium compounds; optical waveguides; piezoelectric materials; refractive index; tantalum compounds; LiTaO3; active structures; dielectric structures; dimensional optical waveguides; electric field; electro-optical properties; electronic polarizabilities; integrated devices; lithium tantalate crystal; natural birefringence data; optical systems; passive structures; piezoelectric materials; refractive index; Birefringence; Lithium compounds; Optical devices; Optical films; Optical polarization; Optical refraction; Optical signal processing; Optical variables control; Optical waveguides; Particle beam optics; Birefringence; Claussius Mossoti equation and Lorentz — Lorenz equation; Localfield; Polarizabilities; Refractiveindices; anisotropy; dipolemoment; susceptibility Lattice summation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nanoelectronics Conference, 2008. INEC 2008. 2nd IEEE International
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1572-4
Electronic_ISBN :
978-1-4244-1573-1
Type :
conf
DOI :
10.1109/INEC.2008.4585567
Filename :
4585567
Link To Document :
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