Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep08770
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Funding
- EPSRC [EP/F048009/1, EP/K032518/1]
- ESTEEM2 (Enabling Science and Technology through European Electron Microscopy) project (7th Framework Programme of the European Commission)
- EPSRC Centre for Innovative Manufacturing in Photonics [EP/H02607X/1]
- Engineering and Physical Sciences Research Council [EP/M008487/1, EP/H02607X/1, EP/K032518/1, EP/M015130/1] Funding Source: researchfish
- EPSRC [EP/M008487/1, EP/K032518/1, EP/H02607X/1, EP/M015130/1] Funding Source: UKRI
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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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