SU8 inverted-rib waveguide Bragg grating filter

Cheng-Sheng Huang, Wei Chih Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


A polymeric SU8 inverted-rib waveguide Bragg grating filter fabricated using reactive ion etching (RIE) and solvent assisted microcontact molding (SAMIM) is presented. SAMIM is one kind of soft lithography. The technique is unique in that a composite hard-polydimethysiloxane/polydimethysiloxane stamp is used to transfer the grating pattern onto an inverted SU8 rib waveguide system. The composite grating stamp can be used repeatedly several times without degradation. Using this stamp and inverter-rib waveguide structure, the Bragg grating filter fabrication can be significantly simplified. The experiment result shows an attenuation dip in the transmission spectra, with a value of -7 dBm at 1550 nm for a grating with a period of 0.492 μm on an inverted-rib waveguide with 6.6 μm width and 4 μm height.

Original languageEnglish
Pages (from-to)5545-5551
Number of pages7
JournalApplied Optics
Issue number22
StatePublished - 1 Aug 2013


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