2012 Fiscal Year Final Research Report
Investigation and application of terahertz switching dynamics in phase change optical recording media
| Project/Area Number |
22340076
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | University of Tsukuba |
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Principal Investigator |
HASE Muneaki 筑波大学, 数理物質系, 准教授 (40354211)
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| Co-Investigator(Renkei-kenkyūsha) |
TOMINAGA Junji 産業技術総合研究所, ナノエレクトロニクス研究部門, 首席研究員 (10357577)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 光記録 / コヒーレントフォノン / 相変化 |
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| Research Abstract |
In this study we aimed to observe lattice dynamics in femto- to pico-second time scales during the crystalline-amorphous phase change in chalcogenide alloy (Ge-Sb-Te mixed crystals), which is extremely important materials for optical recording media. As the results, we could observe ultrafast (< 1 ps) phase change by exciting with double-pulse (pulse-pair). The pump-polarization dependent phase change phenomena have also been found in the pump-probe experiment.
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