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Title: Low Loss Nanostructured Polymers for Chip-scale Waveguide Amplifiers
Authors: Chen, G.F.R
Zhao, X
Sun, Y 
He, C 
Tan, M.C
Tan, D.T.H
Issue Date: 2017
Citation: Chen, G.F.R, Zhao, X, Sun, Y, He, C, Tan, M.C, Tan, D.T.H (2017). Low Loss Nanostructured Polymers for Chip-scale Waveguide Amplifiers. Scientific Reports 7 (1) : 3366. ScholarBank@NUS Repository.
Abstract: On-chip waveguide amplifiers offer higher gain in small device sizes and better integration with photonic devices than the commonly available fiber amplifiers. However, on-chip amplifiers have yet to make its way into the mainstream due to the limited availability of materials with ideal light guiding and amplification properties. A low-loss nanostructured on-chip channel polymeric waveguide amplifier was designed, characterized, fabricated and its gain experimentally measured at telecommunication wavelength. The active polymeric waveguide core comprises of NaYF 4 :Yb,Er,Ce core-shell nanocrystals dispersed within a SU8 polymer, where the nanoparticle interfacial characteristics were tailored using hydrolyzed polyhedral oligomeric silsesquioxane-graft-poly(methyl methacrylate) to improve particle dispersion. Both the enhanced IR emission intensity from our nanocrystals using a tri-dopant scheme and the reduced scattering losses from our excellent particle dispersion at a high solid loading of 6.0 vol% contributed to the outstanding optical performance of our polymeric waveguide. We achieved one of the highest reported gain of 6.6 dB/cm using a relatively low coupled pump power of 80 mW. These polymeric waveguide amplifiers offer greater promise for integrated optical circuits due to their processability and integration advantages which will play a key role in the emerging areas of flexible communication and optoelectronic devices. © 2017 The Author(s).
Source Title: Scientific Reports
ISSN: 20452322
DOI: 10.1038/s41598-017-03543-w
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