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In this letter, we report on a spontaneous optical switch in a liquid crystal (LC) waveguide with a Cr grating coupler. We propose that this mechanism can be applied as a reusable optical fuse device. The dynamical response of the waveguide mode in the nematic liquid crystal was investigated in the near infrared. An incident continuous wave (cw) laser was used. When the incident intensity is below the threshold, the waveguide mode output intensity is proportional to the input. Above the threshold, the output quenches quickly. The sensitivity and the response speed can be controlled by adjusting the temperature with respect to the phase transition of LC.
Published in:
Applied Physics Letters
(Volume:91
,
Issue:
17
)
Date of Publication: Oct 2007
- Page(s):
- 173119 - 173119-3
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.2800795
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Oct 2007
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