1994 Fiscal Year Final Research Report Summary

Depalopment of Optical Memory Using PHB.

Research Project

Project/Area Number	05453125
Research Category	Grant-in-Aid for General Scientific Research (B)
Allocation Type	Single-year Grants
Research Field	無機工業化学
Research Institution	KYOTO UNIVERSITY
Principal Investigator	HIRAO Kazuyuki Fac.Eng., Kyoto Univ., Assoc.Prof.,, 工学部, 助教授 (90127126)
Co-Investigator(Kenkyū-buntansha)	TANAKA Katsuhisa Fac.Eng., Kyoto Univ., Instructor, 工学部, 助手 (80188292)
Project Period (FY)	1993 – 1994
Keywords	Hole Burning / Samarium / Optical Memory / Multiplexed Memory / Borate Glass / PHB Phenomenon
Research Abstract	We have observed the persistent spectral hole burning at room temperature for Sm^<2+> ion doped in alumino-borate, magnesium borate and borosilicate glasses. Hole burning measurement and phonon sideband spectra of these borate glasses indicate that the optical hole is closely related to the local environment of optical center. Especially, the unusual generation of non-bridging oxygen around Sm^<2+> ion seems to be the origin of broadening the hole width for Sm^<2+> doped in borate glasses. Substituting sodium oxide with alumina can only decrease the hole width considerably in borate glasses, which may be due to capturing non-brdging oxygens to [AlO_4] tetrahedra.

(4 results)