Abstract
We report improved photothermal heating efficiency of the Si plasmonic waveguide heaters integrated with ring resonators by enhancing the interaction of the propagating light and metal with thinner buffer layer. The resonance wavelength was shifted toward a longer wavelength by inputting transverse magnetic mode light, and the amount of shift was influenced by lengths of the region deposited with the Co thin film, and gap of the directional coupler. The local temperature rise was 580 K by injecting 6.3 mW light, and the photothermal conversion efficiency as high as 106 K/mW was obtained in a Si plasmonic waveguide deposited with 0.5 μm-long Co thin films, showing improvement compared with previous devices. Discussion on the heating efficiency based on the propagation loss and cavity loss in the ring resonators is given based on experimental results, for realizing compact photothermal waveguide heaters for various applications.
Export citation and abstract BibTeX RIS
During the embargo period (the 12 month period from the publication of the Version of Record of this article), the Accepted Manuscript is fully protected by copyright and cannot be reused or reposted elsewhere.
As the Version of Record of this article is going to be / has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period.
After the embargo period, everyone is permitted to use copy and redistribute this article for non-commercial purposes only, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by-nc-nd/3.0
Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required. All third party content is fully copyright protected, unless specifically stated otherwise in the figure caption in the Version of Record.