Analysis of efficiently poled electro-optic polymer/Tio₂ vertical slot waveguide modulators

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• 作者：Y. Enami^a ; ^{yenami@optics.arizona.edu" class="auth_mail" title="E-mail the corresponding author} ; ^{enami.yasufumi@kochi-tech.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; H. Nakamura^a ; J. Luo^b ; A.K-Y. Jen^b
• 关键词：Electro-optic modulators ; Electro-optic polymers ; Vertical TiO2 slot waveguide ; Sol&ndash ; gel silica cladding
• 刊名：Optics Communications
• 出版年：2016
• 出版时间：1 March 2016
• 年：2016
• 卷：362
• 期：Complete
• 页码：77-80
• 全文大小：772 K

文摘

We analyze the advantages of an electro-optic (EO) polymer/TiO₂ vertical slot waveguide modulator based on a low-index EO polymer (SEO125). This modulator can realize a lower half-wave voltage (V_π)-electrode length (L_e) product (V_πL_e) when compared with hybrid EO polymer (EOP)/sol–gel silica waveguide modulators because of the high mode confinement of the guided light and the high poling efficiency. We show the enhancement of the poling efficiency in these devices when the EO polymers are poled with TiO₂ and sol–gel silica layers. We also enhance the EO coefficient to a level of 260 pm/V at a wavelength of 1.31 μm for a high-index EOP (SEO100) deposited on TiO₂, a sol–gel silica cladding layer, and an additional interfacial layer.