Title :
The role of traps and the balance of manganese valence states in Mn:YAlO/sub 3/, a material for holographic recording and optical data storage
Author :
Noginov, M.A. ; Loutts, G.B. ; Ross, K. ; Grandy, T. ; Noginova, N. ; Lucus, B. ; Mapp, T.
Author_Institution :
Center for Mater. Res., Norfolk State Univ., VA, USA
Abstract :
Summary form only given. Manganese doped YAlO/sub 3/ is a promising material for holographic recording and optical data storage. The recorded holographic grating has high diffraction efficiency, cannot be disturbed by red or infrared reading light, does not require any fixation, has very long life time at room temperature, and can be easily erased at >250/spl deg/C. The photoinduced change of the refraction index accompanies the change in the color, yellowish to bluish-grayish, which we explain by photoionization Mn/sup 4+//spl rarr/Mn/sup 5+/. We experimentally studied photocoloration and thermobleaching of Mn:YAlO/sub 3/ and developed the model describing the balance of valence states in Mn:YAlO/sub 3/.
Keywords :
holographic gratings; manganese; optical materials; optical saturable absorption; optical storage; photoionisation; valence bands; ytterbium compounds; 250 C; Mn/sup 4+//spl rarr/Mn/sup 5+/; Mn:YAIO/sub 3/; YAlO/sub 3/:Mn; bluish-grayish; high diffraction efficiency; holographic recording material; manganese doped YAIO/sub 3/; manganese valence states; optical data storage material; photocoloration; photoinduced change; photoionization; reading light; recorded holographic grating; refraction index; room temperature; thermobleaching; very long life time; Diffraction gratings; Holographic optical components; Holography; Manganese; Memory; Optical diffraction; Optical materials; Optical recording; Optical refraction; Temperature;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.839048
