Organic electro-optic modulator using transparent conducting oxides as electrodes

Guoyang Xu*, Zhifu Liu, Jing Ma, Boyang Liu, Seng Tiong Ho, Lian Wang, Peiwang Zhu, Tobin J. Marks, Jingdong Luo, Alex K.Y. Jen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


A novel organic electro-optic (EO) modulator using transparent conducting oxides (ZnO and In2O3) as electrodes is demonstrated for the first time. The modulator employs the poled guest-host chromophore/polymer material AJL8/APC having r33=35pm/V and is able to achieve a low Vπ=2.8 V switching voltage for an 8mm-long device at a wavelength of 1.31μm. This corresponds to a Vπ=1.1 V switching voltage for a 1cm-long device in a push-pull configuration. The push-pull V πL figure of merit normalized for the EO coefficient is thus 1.1V-cm/(35 pm/V), which is 3-4x lower than that can be achieved with a convetional modulator structure. The bottom electrode is ZnO grown by Metal-Organic Vapor Deposition (MOCVD) and top electrode In2O 3 deposited using ion-beam assisted deposition. The top electrode is directly deposited on the guest-host organic material. The design and fabrication considerations for the modulator are also discussed.

Original languageEnglish (US)
Pages (from-to)7380-7385
Number of pages6
JournalOptics Express
Issue number19
StatePublished - Sep 19 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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