1995 Fiscal Year Final Research Report Summary
EXCITED STATES OF 3d-ELECTRON AND LATTICE RELAXATION IN SEMIMAGNETIC-SEMICONDUCTORS
| Project/Area Number |
06452037
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
固体物性Ⅰ(光物性・半導体・誘電体)
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
NAKAHARA Junichiro Hokkaido Univ., Grad.Sch. of Sci., Prof., 大学院理学研究科, 教授 (30013527)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Sekika Hokkaido Univ., Grad.Sch. of Sci., Reas.Assoc., 大学院理学研究科, 助手 (50270781)
WATANABE Junji Hokkaido Univ., Grad.Sch. of Sci., Assoc.Prof., 大学院理学研究科, 助教授 (60201191)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Semimagnetic Semiconductor / d-states / Excited States / Lattice Relaxation / Relaxd Process / Localized States |
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| Research Abstract |
The energy shift of the Mn^<2+> photoluminescence peak according to excitation energy is observed at low temperatures. Using this shift we estimate inhomogeneou and homogeneous broadening of Mn^<2+> photoluminescence separately. In creasing temperatures inhomogeneous broadening changes its character to homogeneous one. Time profiles of infrared photoluminescence are investigated and their built up processes are explained using energy transfer from the extended states to localized states. High density effects of excited d-multiplet states of Mn^<2+> are investigated at 2K and nonexponential decay are observed at high density excitation. At the initial part of the decay profiles extra decay with short life time appear and its intensity increases. This effect is considered as the precursor effect of super flourescence or super radiance.
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