Highly Efficient Diels–Alder Crosslinkable Electro-Optic Dendrimers for Electric-Field Sensors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Zhengwei Shi
  • Steven Hau
  • Tae-Dong Kim
  • Neil M. Tucker
  • Jae-Won Ka
  • Haishan Sun
  • Anna Pyajt
  • Larry Dalton
  • Antao Chen

Detail(s)

Original languageEnglish
Pages (from-to)2557-2563
Journal / PublicationAdvanced Functional Materials
Volume17
Issue number14
Online published7 Aug 2007
Publication statusPublished - Sep 2007
Externally publishedYes

Abstract

One of the most challenging tasks encountered in developing highly efficient electro-optic (EO) devices is to find a material system that possesses all desirable properties such as large EO coefficients, good thermal and mechanical stability, and low optical loss. In order to meet this stringent requirement, we have developed a series of crosslinkable EO dendrimers using the standardized AJL8-type chromophore as the center core and the furyl- and anthryl-containing dendrons as the periphery. Upon adding a trismaleimide (TMI) dienophile, these dendrimers could be in-situ crosslinked via the Diels-Alder cycloaddition and efficiently poled under a high electric field. Through this dynamic process, the spatially voided and π-electron-rich surrounding of the chromophore core changes into a dense and more aliphatic network, with the dipolar chromophore embedded and aligned inside. The resultant materials exhibit large EO coefficients (63-99 pm V-1 at 1.31 μm), excellent temporal stability (the original r33 values remain unchanged at 100°C for more than 500 h), and blue-shifted near-IR absorption. With these combined desirable properties, a poled EOD2/TMI film could be processed through multiple lithographic and etching steps to fabricate a racetrack-shaped micro-ring resonator. By coupling this ring resonator with a side-polished optical fiber, a novel broad-band electric-field sensor with high sensitivity of 100 mVm-1 at 550 MHz was successfully demonstrated.

Citation Format(s)

Highly Efficient Diels–Alder Crosslinkable Electro-Optic Dendrimers for Electric-Field Sensors. / Shi, Zhengwei; Hau, Steven; Luo, Jingdong; Kim, Tae-Dong; Tucker, Neil M.; Ka, Jae-Won; Sun, Haishan; Pyajt, Anna; Dalton, Larry; Chen, Antao; Jen, Alex K.-Y.

In: Advanced Functional Materials, Vol. 17, No. 14, 09.2007, p. 2557-2563.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal