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Issue 3, 2016
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Novel fluorinated polycarbonate negative-type photoresists for thermo-optic waveguide gate switch arrays

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Abstract

A series of novel thermo-optic (TO) polymers (AF-Z-PC EPs) were achieved and they could be mixed with photoinitiator in solvent and to produce the negative-type fluorinated photoresists (NFPRs). TO waveguide switch arrays were fabricated based on the direct UV-written technique using the NFPRs. As the core of waveguide materials, AF-Z-PC EPs were synthesized by solution polymerization with 4,4′-(hexafluoro-isopropylidene) diphenol (6F-BPA) and bisphenol Z (BPZ) with triphosgene (BTC) and further reacted with epoxy chloropropane. The refractive index of the polymers can be adjusted by controlling the content of BPZ. Through a simple lithography process, the NFPRs can be fabricated as the waveguide easily. The propagation loss of a 4 μm wide straight waveguide was only 0.19 dB cm−1 at 1550 nm. The insertion loss of the device was directly measured to be about 9.0 dB. The rise and fall times of the device applied 200 Hz square-wave voltage were obtained as 1.546 ms and 1.226 ms, respectively. The switching power was about 15.5 mW, and the extinction ratio was 13.0 dB. The low-loss integrated switch arrays are suitable for realizing large-scale photonic integrated circuits.

Graphical abstract: Novel fluorinated polycarbonate negative-type photoresists for thermo-optic waveguide gate switch arrays

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Publication details

The article was received on 04 Nov 2015, accepted on 14 Dec 2015 and first published on 15 Dec 2015


Article type: Paper
DOI: 10.1039/C5TC03657G
J. Mater. Chem. C, 2016,4, 533-540

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    Novel fluorinated polycarbonate negative-type photoresists for thermo-optic waveguide gate switch arrays

    Z. Cai, B. Wang, Y. Zheng, M. Li, Y. Li, C. Chen, D. Zhang, Z. Cui and Z. Shi, J. Mater. Chem. C, 2016, 4, 533
    DOI: 10.1039/C5TC03657G

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