Piezo-optic birefringence in NaCl structure crystals. I. Theory

Bansigir, K. G.; Iyengar, K. S.

doi:10.1107/s0365110x61002011

Cited by 16 publications

(10 citation statements)

References 1 publication

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“…This approach was able to explain the wavelength dependence in terms of a model of a single oscillator whose energy is split and the oscillator strength is modified by the stress. Another theory based on the polarizable point ion model was that of Bansigir and Iyengar [29] who accounted for changes in the ionic polarizabilities. Gavini and Cardona [30] took into account the strong dispersion encountered near the exciton absorption edge.…”

Section: Dispersion In the Linear And Second-order Bond Polarizabilitmentioning

confidence: 99%

Dispersion in the Linear and Second‐Order Bond Polarizabilities of Alkali Halides

Kucharczyk

1994

Physica Status Solidi (b)

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An analysis of dispersion in the linear bond polarizability and in the lattice contribution to the second-order polarizability of some alkali halides is performed. The linear and nonlinear polarizabilities are evaluated employing the elasto-optic coefficients p1 p 1 2 , and pd4. The results obtained show significant wavelength dependence of the linear polarizability and the longitudinal component of the second-order polarizability. The anisotropy of the bond polarizability is also found to be frequency dependent.

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Section: Dispersion In the Linear And Second-order Bond Polarizabilitmentioning

confidence: 99%

Dispersion in the Linear and Second‐Order Bond Polarizabilities of Alkali Halides

Kucharczyk

1994

Physica Status Solidi (b)

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“…During recent years new observations relating to the elasto-optic coefficient P44 and the corresponding piezo-optic coefficient q44 have been reported (Laiho & Korpela, 1968;Rahman & Iyengar, 1970). In this paper the theory has been extended on the lines of Part I (Bansigir & Iyengar, 1961a) to cover the related phenomena.…”

Section: Introductionmentioning

confidence: 97%

“…Some years ago, an improved theory (Bansigir & Iyengar, 1961a) of artificial birefringence observed in cubic crystals with the sodium chloride structure, subject to uni~xial deformation in the direction of a cube axis, was developed. The theory was limited to a discussion of observations made along a cube axis chosen normal to the deformation axis and the birefringence characterized by the elasto-optic coefficients Pu and P12 and their difference.…”

Section: Introductionmentioning

confidence: 99%

“…The theory was limited to a discussion of observations made along a cube axis chosen normal to the deformation axis and the birefringence characterized by the elasto-optic coefficients Pu and P12 and their difference. The consequences following from the theory were separately dealt in Part II of the paper (Bansigir & Iyengar, 1961b). During recent years new observations relating to the elasto-optic coefficient P44 and the corresponding piezo-optic coefficient q44 have been reported (Laiho & Korpela, 1968;Rahman & Iyengar, 1970).…”

Section: Introductionmentioning

confidence: 99%

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Piezo-optic birefringence in NaCl structure crystals. III

Ethiraj¹,

Bansigir²

1973

Acta Cryst Sect A

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“…Expressions for the change in refractive indices due to uniaxial stress along [100] in NaCl-type crystals were developed by Bansigir & Iyengar (1961a), and from these expressions the birefringence characterized by the elasto-optic constants (Pll--P12) was obtained. The consequences of the theory were dealt with by Bansigir & Iyengar (1961b). Ethiraj & Bansigir (1973) extended the theory to the birefringence characterized by the elasto-optic coefficient P44 and the corresponding piezooptic coefficient q44.…”

Section: Introductionmentioning

confidence: 99%

Piezo-optic birefringence in CsCl-type crystals

Ethiraj¹,

Murty²,

Bansigir³

1978

Acta Cryst Sect A

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Following the theoretical approach of Bansigir and Iyengar, the expression for P44 for the crystals of CsC1 type is developed. Polarizabilities of some ions at 5890 A are evaluated with experimental values ofp44 and are found to be in good agreement with reported values. Polarizabilities of the ions in CsI at different wavelengths in the range 3000 to 5890 A are also evaluated.The results are given for the calculation of the profile function of the scattering curve and the calculated primary extinction factor for a crystal in the form of a square-section parallelepiped as a function of its size 7:, expressed in extinction length units. The calculations are based on the equations of the dynamical theory of diffraction. Asymmetry of the scattering curve and a shift of its principal maximum to larger angles, with r and the Bragg angle increasing, are found. Approximate expressions for calculating the primary extinction factor as a function of r are given.

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Piezo-optic birefringence in NaCl structure crystals. I. Theory

Cited by 16 publications

References 1 publication

Dispersion in the Linear and Second‐Order Bond Polarizabilities of Alkali Halides

Dispersion in the Linear and Second‐Order Bond Polarizabilities of Alkali Halides

Piezo-optic birefringence in NaCl structure crystals. III

Piezo-optic birefringence in CsCl-type crystals

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