Photo-induced optical activity in phase-change memory materials.
Photo-induced optical activity in phase-change memory materials.
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DOI:
10.1038/srep08770
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发表时间:
2015-03-05
影响因子:
4.6
通讯作者:
Kirkland AI
中科院分区:
文献类型:
--
作者:
Borisenko KB;Shanmugam J;Williams BA;Ewart P;Gholipour B;Hewak DW;Hussain R;Jávorfi T;Siligardi G;Kirkland AI
We demonstrate that optical activity in amorphous isotropic thin films of pure Ge2Sb2Te5 and N-doped Ge2Sb2Te5N phase-change memory materials can be induced using rapid photo crystallisation with circularly polarised laser light. The new anisotropic phase transition has been confirmed by circular dichroism measurements. This opens up the possibility of controlled induction of optical activity at the nanosecond time scale for exploitation in a new generation of high-density optical memory, fast chiroptical switches and chiral metamaterials.
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