An azobenzene functionalized polymer for laser direct writing waveguide fabrication

Zhiqiang Liu, Namkhun Srisanit, Xianjun Ke, Pengfei Wu, Sangyup Song, Jame J. Yang, Michael Renxun Wang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report on non-lithographic laser direct writing fabrication of optical waveguides by using a 4′-hydroxy-4-nitroazobene dye-functionalized polymer film. The polymer film reveals permanent change of refractive index at high laser illumination intensity. A focused continuous wave low power green laser beam at 532 nm wavelength is used to directly write waveguide structures on the polymer film. The magnitude of refractive index increase at film surface is about 0.006. One-step laser writing results in graded index waveguides in film depth direction under ambient conditions without pre- and post-processing. As a by-product, the laser writing also results in a very small air valley at the boundary between the laser written and non-written regions which may contribute in part although minimal to the waveguide lateral confinement and can be used for visual observation of waveguide patterns. The fabricated waveguide is found to be stable and easily reproducible.

Original languageEnglish
Pages (from-to)94-98
Number of pages5
JournalOptics Communications
Volume273
Issue number1
DOIs
StatePublished - May 1 2007

Fingerprint

Azobenzene
Polymers
Waveguides
waveguides
Fabrication
fabrication
Polymer films
Lasers
polymers
lasers
Refractive index
refractivity
visual observation
Optical waveguides
preprocessing
Processing
optical waveguides
continuous radiation
Laser beams
valleys

Keywords

  • Azobenzene
  • Non-lithographic fabrication
  • Polymer
  • Waveguide

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

An azobenzene functionalized polymer for laser direct writing waveguide fabrication. / Liu, Zhiqiang; Srisanit, Namkhun; Ke, Xianjun; Wu, Pengfei; Song, Sangyup; Yang, Jame J.; Wang, Michael Renxun.

In: Optics Communications, Vol. 273, No. 1, 01.05.2007, p. 94-98.

Research output: Contribution to journalArticle

Liu, Zhiqiang ; Srisanit, Namkhun ; Ke, Xianjun ; Wu, Pengfei ; Song, Sangyup ; Yang, Jame J. ; Wang, Michael Renxun. / An azobenzene functionalized polymer for laser direct writing waveguide fabrication. In: Optics Communications. 2007 ; Vol. 273, No. 1. pp. 94-98.
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