Electrically tunable liquid crystal waveguide attenuators

Dong Po Cai, Shan Chi Nien, Hua Kung Chiu, Chii Chang Chen, Chien Chieh Lee

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The attenuator for the wavelength at 1550 nm is fabricated by using the capillary effect to infiltrate liquid crystal (LC) E7 into hollow waveguides (HWGs) on silicon substrate with SiO2 cladding layer. The length of the waveguide is 0.4 cm. The device can be operated with relatively low driving voltage below 5 Vpp with the distance between two electrodes to be 9 μm. The light attenuation of the device can be over 30 dB. The performance of the device is independent of the polarization states of the input light.

Original languageEnglish
Pages (from-to)11890-11896
Number of pages7
JournalOptics Express
Issue number12
StatePublished - 6 Jun 2011


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