Correlation of the photorefractive sensitivity in doped LiNbO3 with chemically induced changes in the optical absorption spectra

Vertical Bridgman growth and optical characterization of LiNbO3:Cu:Ce crystals

“…Usually, LiNbO 3 :Cu crystal is orange in color, while LiNbO 3 :Ce is pale pink in color [9]. The cut-off wavelength of D-band associated with the intervalence transfer Cu + -Nb 5+ is about 620 nm for Cu [10]. Electrons can be excited from Cu + by light with the wavelength shorter than 620 nm, which may result in a strong absorption band centered at 400 nm.…”

EPR spectra and local lattice structure of Fe3+ impurity ions in ferroelectric LiNbO3

“…LiNbO 3 crystal is of sustained scientific and technical interest, mainly due to its desirable ferroelectric, piezoelectric, and photoelectric properties [1][2][3][4][5][6], even for acoustical memory as recently reported [1]. The most extensive application is the ferroelectric property which mainly origins from the structure distortion in LiNbO 3 itself, i.e.…”

“…the Li + and Nb 5+ cations move away from their position in the paraelectric phase [5]. It is known that specific transition metal doping can increase the photorefractive sensitivity by a factor of 10 3 , especially the iron ion [6]. In order to understand the influence of this impurity on the material's properties, extensive studies capable of giving insight into the local site of incorporation have been done in both theory and experiment [7][8][9][10][11].…”

EPR investigation of substitution position for Fe3+ in LiNbO3:Fe3+ system

“…Lithium niobate, LiNbO 3 , is of significant interest due to its ferroelectric, piezoelectric, and photoelectric properties [1][2][3][4][5][6][7][8][9][10], which make it a very good candidate for photoelectric devices.…”