Properties of Extraordinary Polaritons in LiNbO 3 | Zendy

Posledovich M. | Zendy; Winter F. X. | Zendy; Borstel G. | Zendy; Claw R. | Zendy

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Properties of Extraordinary Polaritons in LiNbO 3

Author(s) -

Posledovich M.,

Winter F. X.,

Borstel G.,

Claw R.

Publication year - 1973

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220550228

Subject(s) - polariton , dispersion (optics) , optics , physics , wave vector , basis (linear algebra) , principal axis theorem , mathematics , geometry

On the basis of corrected assignments of the optical phonons in LiNbO 3 the dispersion branches of extraordinary polaritons have been calculated for different wave vector directions with respect to the optic axis of the material. A fundamental feature of extraordinary polaritons is the lifting of crossing points between dispersion branches for wave vector directions different from the principal directions. A first experimental observation of this effect is presented and has been compared with theoretical data. Furthermore the experiments allow a simultaneous observation of the lowest frequency ordinary and extraordinary polariton branches.

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