Optical characterization of Mn:YAlO_3 : material for holographic recording and data storage

Effect of Manganese Concentration on Thermoluminescent Properties of YAlO3:Mn Crystals

“…Manganese-doped YAlO 3 crystals became of particular interest after it was shown their application potential for holographic recording and optical data storage [1][2][3] as well as for thermoluminescent (TL) dosimetry of ionizing radiation [4,5].…”

“…The crystals being exposed to blue-green laser light show an intensive bluish-gray coloration caused by Mn 5+ ions created as a result of the Mn 4+ → Mn 5+ + e − photoionization process [1,2,6]. In such a way the Mn 4+ ions demonstrate sensitivity to the visible light exposure.…”

Growth and spectroscopic properties of RE, Mn:YAP (RE=Yb and Ce) photorefractive crystals

“…There is close to linear dependence of the maximum achievable Mn 5+ photoinduced absorption and Mn 4+ absorption (480 nm) in nonexposed crystal [2]. At room temperature (RT), long dark storage time of more than 120 years has been anticipated in Mn:YAP crystal [4], and the holographic grating can be easily erased at the temperature of 270 1C or above [1][2][3][4]. Such characteristics in combination with the high quality and low optical scattering of the crystal make Mn:YAP the most promising material for holographic recording and data storage.…”

“…[3], the holographic recording mechanism of Mn:YAP is associated with a two-photon process in which the photoionization of Mn 4+ ions (Mn 4+ -Mn 5+ +e) takes place; the photoionization produces mobile charge and a buildup of a spacecharge field that can modulate the refractive index of the material. There is close to linear dependence of the maximum achievable Mn 5+ photoinduced absorption and Mn 4+ absorption (480 nm) in nonexposed crystal [2]. At room temperature (RT), long dark storage time of more than 120 years has been anticipated in Mn:YAP crystal [4], and the holographic grating can be easily erased at the temperature of 270 1C or above [1][2][3][4].…”

“…4, the absorption spectra of g-irradiated crystals contain absorption bands in the 500-800 nm region associated with Mn 5+ ions as well as an additional broad structureless band that covers practically the entire visible region [5]. The coloration in the crystals is due to the ionization of Mn 4+ -Mn 5+ +e [2,10]. The Yb, Mn:YAP sample ( Fig.…”