Tunable liquid crystal-resonant grating filters using superimposed grating structures fabricated by nanoimprint lithography

Allan S.P. Chang, Keith J. Morton, Patrick Murphy, Hua Tan, Wei Wu, Stephen Y. Chou

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

Tunable resonant grating filter with super-imposed alignment gratings for liquid crystal E7 cladding as the tuning layer was demonstrated. In the fabrication of the super-imposed gratings (SIG), the first level of 200 nm pitch gratings was imprinted in a thin layer of spun-on thermoplastic resist by thermal nanoimprint lithography, using a mold pre-fabricated by interference lithography. At a resonant wavelength incident upon the structure, a waveguide mode was excited in the waveguide layer through evanescent wave. It was observed that the potential for monolithic integration on a chip, easy fabrication, and low cost will make SRG filter an important element for wavelength division multiplexing (WDM) optical telecommunication.

Original languageEnglish (US)
Pages (from-to)298-299
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Volume1
StatePublished - Dec 1 2004
Event2004 IEEE LEOS Annual Meeting Conference Proceedings, LEOS 2004 - Rio Grande, Puerto Rico
Duration: Nov 7 2004Nov 11 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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