Recent progress in developing highly efficient and thermally stable nonlinear optical polymers for electro-optics

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

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Author(s)

  • Sen Liu
  • Marnie A. Haller
  • Jae-Wook Kang
  • Tae-Dong Kim
  • Sei-Hum Jang
  • Baoquan Chen
  • Neil Tucker
  • Hongxiang Li
  • Hong-Zhi Tang
  • Larry R. Dalton
  • Yi Liao
  • Bruce H. Robinson

Detail(s)

Original languageEnglish
Pages (from-to)36-43
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Volume5351
Publication statusPublished - 18 Jun 2004
Externally publishedYes

Conference

TitleIntegrated Optoelectronic Devices 2004
PlaceUnited States
CitySan Jose, CA
Period26 - 29 January 2004

Abstract

Recent development of high-performance nonlinear optical polymers for electro-optics (E-O) is reviewed in this paper. A highly efficient and thermally stable nonlinear optical (NLO) chromophore, namely 2-[4-(2-{5-[2-(4-{Bis-[2- (tert-butyl-dimethyl-silanyloxy)-ethyl]-amino}-phenyl)-vinyl]-thiophen-2-yl} -vinyl)-3-cyano-5-methyl-5-trifluoromethyl-5H-furan-2-ylidene]-malononitrile, has been prepared and incorporated in amorphous polycarbonate (APC) composites. The result from high electric field poling shows a very large E-O coefficient (r33 = 94 pm/V at 1.3 μm), ∼80% of which can be maintained at 85°C for more than 500 hrs. In addition to this guest/host sysytem, a high Tg side-chain polymer, derived from a 3-D cardo-type polyimide with dendron-encapsulated chromophores as pendent groups has also been synthesized and characterized. A high degree of chromophore dipole orientation and a large r33 of 71 pm/V at 1.3 μm can be achieved in this poled polyimide. More than 90% of its E-O activity can be maintained at 85°C for more than 600 hours. To access the full potential of poled polymers for device applications, we have developed a new lattice-hardening approach to overcome the "nonlinearity-stability-tradeoff" of conventional thermoset methods. By using the Diels-Alder lattice-hardening process, we can achieve the same high poling efficiency and large r33 value as in a guesthost system while maintaining good thermal stability seen in densely-crosslinked polymers. By modifying the electronic properties of the crosslinking reagents, we can fine-tune the processing temperature window of the Diels-Alder reactions to achieve hardened materials with optimal properties.

Citation Format(s)

Recent progress in developing highly efficient and thermally stable nonlinear optical polymers for electro-optics. / Luo, Jingdong; Liu, Sen; Haller, Marnie A.; Kang, Jae-Wook; Kim, Tae-Dong; Jang, Sei-Hum; Chen, Baoquan; Tucker, Neil; Li, Hongxiang; Tang, Hong-Zhi; Dalton, Larry R.; Liao, Yi; Robinson, Bruce H.; Jen, Alex K.-Y.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5351, 18.06.2004, p. 36-43.

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