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Title: Theoretical study of bicharacteristic waveguide for fundamental-mode phase-matched SHG from MIR to NIR
Authors: Huang, Tianye
Xu, Guizhen
Pan, Jianxing
Cheng, Zhuo
Shum, Perry Ping
Brambilla, Gilberto
Keywords: Coupled Mode Theory
Engineering::Electrical and electronic engineering
Phase Matching
Issue Date: 2019
Source: Huang, T., Xu, G., Pan, J., Cheng, Z., Shum, P. P., & Brambilla, G. (2019). Theoretical study of bicharacteristic waveguide for fundamental-mode phase-matched SHG from MIR to NIR. Optics Express, 27(11), 15236-15250. doi:10.1364/OE.27.015236
Series/Report no.: Optics Express
Abstract: In this paper, a bicharacteristic waveguide (BW) is proposed for fundamental-mode phase-matched second harmonic generation (SHG) from mid-infrared (MIR) to near-infrared (NIR). The required phase matching condition (PMC) is satisfied between the fundamental plasmonic mode at 3100 nm and the photonic mode at 1550 nm. With 1 W pump power, the SHG conversion efficiency of 4.173% can be obtained in 90.3 μm length waveguide. Moreover, the SHG conversion can be enhanced by using a microring resonator (MRR). By optimizing the MRR, the SHG conversion efficiency is increased to 8.30%. The proposed waveguide can also provide a promising platform for upconversion detection. By using an on-chip cascaded configuration, a gas sensor with the capability of MIR absorption and NIR detection is proposed. It is found that the detection limit (DL) can reach 1.04 nmol/L with 100 mW pump power, which shows significant enhancement compared with direct MIR absorption and detection.
ISSN: 1094-4087
DOI: 10.1364/OE.27.015236
Rights: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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