Optically induced sub-wavelength transient apertures in Sb-Te based films

Robert E. Simpson, Paul J. Fons, Alexander V. Kolobov, Xiomin Wang, Junji Tominaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The origin of sub-diffraction-limit apertures in Sb-based thin films is discussed. Electromagnetic energy can be channeled by these apertures thus allowing near-field focussing- the Super-RENS effect. The aperture formation within Sb, Sb 2Te 3 , Sb 2Te, SbTe and Ge 2Sb 2Te 5 is investigated by time resolved optical pump-probe techniques and found to occur without melting. Density functional calculations have shown that these materials exhibit a threshold-like change in their optical properties below their melting temperatures. The threshold is shown to be a consequence of thermally induced misalignment of p-orbital bonds. It is the non-linearity of this process that leads to the formation of the sub-diffraction-limit apertures.

Original languageEnglish
Title of host publicationPhase-Change Materials for Memory and Reconfigurable Electronics Applications
Number of pages6
Publication statusPublished - 2011
Externally publishedYes
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2011 Apr 252011 Apr 29

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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