Abstract

This letter reports a tunable optical grating based on buckled thin film with periodic sinusoidal patterns on a transparent elastomeric substrate. Submicron scale sinusoidal gratings have been fabricated with nanometer thick Gold/Palladium film coated on 30% pretensioned polydimethylsiloxane substrates. Due to competition between the soft elastomeric substrates and relatively stiff films, periodic wavy profiles are created upon releasing the pretension. The buckling profiles can be easily tuned by mechanically stretching or compressing. Optical transmittance diffraction testing has been conducted, and 85 nm peak wavelength shifts of the first order diffraction have been achieved by stretching the grating up to 30% of its original length.

Original languageEnglish (US)
Article number041111
JournalApplied Physics Letters
Volume96
Issue number4
DOIs
StatePublished - 2010

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gratings
thin films
releasing
buckling
profiles
diffraction
compressing
palladium
transmittance
gold
shift
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Tunable optical gratings based on buckled nanoscale thin films on transparent elastomeric substrates. / Yu, Cunjiang; O'Brien, Kevin; Zhang, Yong-Hang; Yu, Hongbin; Jiang, Hanqing.

In: Applied Physics Letters, Vol. 96, No. 4, 041111, 2010.

Research output: Contribution to journalArticle

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AB - This letter reports a tunable optical grating based on buckled thin film with periodic sinusoidal patterns on a transparent elastomeric substrate. Submicron scale sinusoidal gratings have been fabricated with nanometer thick Gold/Palladium film coated on 30% pretensioned polydimethylsiloxane substrates. Due to competition between the soft elastomeric substrates and relatively stiff films, periodic wavy profiles are created upon releasing the pretension. The buckling profiles can be easily tuned by mechanically stretching or compressing. Optical transmittance diffraction testing has been conducted, and 85 nm peak wavelength shifts of the first order diffraction have been achieved by stretching the grating up to 30% of its original length.

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