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Holographically formed, acoustically switchable gratings based on polymer-dispersed liquid crystals.

Yan Jun Liu1, Mengqian Lu, Xiaoyun Ding

  • 1Department of Engineering Science and Mechanics, The Pennsylvania State University, PA, USA.

Journal of Laboratory Automation
|August 23, 2012
PubMed
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Surface acoustic waves (SAWs) control holographic polymer-dispersed liquid crystal (H-PDLC) gratings, switching their optical properties. This acoustic control enables tunable diffraction and transmission for photonic devices.

Area of Science:

  • Photonics
  • Materials Science
  • Acoustics

Background:

  • Holographic polymer-dispersed liquid crystals (H-PDLCs) are known for their tunable optical properties.
  • Surface acoustic waves (SAWs) are utilized for micro-actuation and signal processing.

Purpose of the Study:

  • To investigate the effect of surface acoustic waves (SAWs) on holographic polymer-dispersed liquid crystal (H-PDLC) gratings.
  • To explore the potential of SAW-driven H-PDLC gratings for photonic applications.

Main Methods:

  • Fabrication of H-PDLC gratings.
  • Application of SAWs to the H-PDLC gratings.
  • Measurement of diffraction and transmission properties under SAW actuation.

Main Results:

Keywords:
H-PDLCacoustic streamingsurface acoustic waves

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  • SAW application resulted in switchable properties of the H-PDLC grating.
  • Diffraction decreased while transmission increased upon applying SAWs.
  • Acoustic streaming and thermal diffusion were identified as mechanisms for the observed switching behavior.

Conclusions:

  • SAW-driven H-PDLC gratings demonstrate tunable optical switching.
  • These gratings offer potential for advanced photonic devices like optical switches and spatial light modulators.