Selective rearrangement of Nd3+ centers in LiNbO3 under ferroelectric domain inversion by electron beam writing
Entidad
UAM. Departamento de Física Aplicada; UAM. Departamento de Física de MaterialesEditor
American Physical SocietyFecha de edición
2008-07-30Cita
10.1103/PhysRevB.78.014114
Physical Review B 78.1 (2008): 014114
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.78.014114Versión del editor
https://doi.org/10.1103/PhysRevB.78.014114Materias
Lithium Niobates; Erbium; Ridge Waveguides; FísicaNota
The following article appeared in Physical Review B - Condensed Matter and Materials Physics 78.1 (2008): 014114 and may be found at https://journals.aps.org/prb/abstract/10.1103/PhysRevB.78.014114Derechos
© 2008 The American Physical SocietyResumen
Different values of the electronic charge provided by a direct electron beam writing system have been used to produce polarization inverted domain regions in the micrometer range on Nd3+ optically activated LiNbO3. The effect of the electronic charge on the Nd3+ center structure has been studied by means of low-temperature luminescence from Nd3+ ions. The axial crystal field acting on the Nd3+ centers has been analyzed through the F4 3/2 energy-level splitting of the Nd3+ ions. From there we have determined the position of Nd3+ ions into the Li+ octahedra for the different unequivalent centers in domains reversed with different electronic doses. The results show that the axial crystal field acting on the unequivalent Nd3+ centers can be selectively modified by means of the different doses applied to produce the inversion of the polarization. Moreover, a control of the discrete shifts suffered by the Nd3+ ions into the Li+ octahedra after the inversion process can be carried out in the range 0-0.02Å by selecting the type of Nd center to be shifted by means of the different electronic charge. The behavior of each Nd3+ center after the polarization inversion under different doses can be discriminated and the different nature, as well as the polar character of the Nd3+ centers, is clearly manifested
Lista de ficheros
Google Scholar:Molina, P.
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Ramírez Herrero, María de la O
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García Solé, José
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Bausa López, Luisa Eugenia
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García Carretero, Basilio Javier
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