Development of low-loss tio2 waveguides

I. Hegeman, M. Dijkstra, F. B. Segerink, W. Lee, S. M. Garcia-Blanco*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)
156 Downloads (Pure)


TiO2channel waveguides were fabricated using a DC sputter deposition process, followed by photolithography and reactive ion etching. A SiO2 cladding was deposited using evaporation. SEM, TEM and Raman measurements indicate the presence of both an amorphous and a crystalline phase. As the layer thickness increases, poly-crystalline structures start forming. Loss measurements were performed by imaging the scattered light from the top of the channel waveguides and fitting an exponential decay to the intensity profile. Propagation losses of 7.8-0.52 dB/cm at a wavelength of 632.8 nm and 0.68-0.46 dB/cm at a wavelength of 1010 nm were experimentally characterized.

Original languageEnglish
Pages (from-to)5982-5990
Number of pages9
JournalOptics express
Issue number5
Publication statusPublished - 2 Mar 2020


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