Ultra-thin free-standing single crystalline silicon membranes with strain control

A. Shchepetov, M. Prunnila, F. Alzina, L. Schneider, J. Cuffe, H. Jiang, E.I. Kauppinen, C.M. Sotomayor Torres, J. Ahopelto

Research output: Contribution to journalArticleScientificpeer-review

50 Citations (Scopus)
117 Downloads (Pure)

Abstract

We report on fabrication and characterization of ultra-thin suspended single crystalline flat silicon membranes with thickness down to 6 nm. We have developed a method to control the strain in the membranes by adding a strain compensating frame on the silicon membrane perimeter to avoid buckling after the release. We show that by changing the properties of the frame the strain of the membrane can be tuned in controlled manner. Consequently, both the mechanical properties and the band structure can be engineered, and the resulting membranes provide a unique laboratory to study low-dimensional electronic, photonic, and phononic phenomena.
Original languageEnglish
Article number192108
Pages (from-to)1-4
JournalApplied Physics Letters
Volume102
Issue number19
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • band structure buckling
  • elemental semiconductors
  • semiconductor thin films
  • silicon
  • strain control

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