Non-melting super-resolution near-field apertures in Sb-Te alloys

R. E. Simpson, P. Fons, X. Wang, A. V. Kolobov, T. Fukaya, J. Tominaga

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


The super-resolution near-field structure permits the formation of short-lived subdiffraction limit apertures that channel electromagnetic energy at the aperture boundary. This effect is commonly observed when a laser is focused onto a thin film of Sb based material. The aperture formation within Sb, Sb2 Te3, Sb2 Te, and SbTe is investigated by time resolved optical pump-probe techniques and found to occur without melting. Ab initio modeling has shown a threshold-like change in the optical properties below the melting temperature which leads to the formation of a near-field aperture. This threshold is shown to be a consequence of thermally induced misalignment of p-type bonding.

Original languageEnglish
Article number161906
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 2010 Oct 18
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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