Manipulation of optical field distribution in layered composite polymeric-inorganic waveguides

Jussi Hiltunen (Corresponding Author), Sanna Uusitalo, Pentti Karioja, Stuart Pearce, Martin Charlton, Meng Wang, Jarkko Puustinen, Jyrki Lappalainen

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

We discuss the manipulation of optical field distribution in a low-refractive index polymeric waveguide by depositing a thin high refractive index Ta2 O5 film on top of the waveguide. According to microstructure studies, the sputtered Ta2 O5 thin films deposited on the polymer layer were very smooth with root mean square surface roughness value of 0.58 nm, had amorphous phase, and were optimal for integrated optical devices. Both computational and experimental optical studies suggest that the inorganic-polymeric composite waveguide design greatly increases the intensity distribution of the propagating mode at the surface. Consequently, the interaction of the optical field with the ambient surrounding medium is enhanced by a factor of about 1.7 in order of magnitude.

Original languageEnglish
Article number111113
JournalApplied Physics Letters
Volume98
Issue number11
DOIs
Publication statusPublished - 14 Mar 2011
MoE publication typeA1 Journal article-refereed

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