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https://doi.org/10.1364/OE.392677
Title: | Demonstration of mid-infrared slow light one-dimensional photonic crystal ring resonator with high-order photonic bandgap | Authors: | Sun, Fujun Dong, Bowei Wei, Jingxuan Ma, Yiming Tian, Huiping Lee, Chengkuo |
Keywords: | Science & Technology Physical Sciences Optics WAVE-GUIDES SILICON PHOTONICS DISPERSION SAPPHIRE ABSORPTION DESIGN SENSOR |
Issue Date: | 12-Oct-2020 | Publisher: | OPTICAL SOC AMER | Citation: | Sun, Fujun, Dong, Bowei, Wei, Jingxuan, Ma, Yiming, Tian, Huiping, Lee, Chengkuo (2020-10-12). Demonstration of mid-infrared slow light one-dimensional photonic crystal ring resonator with high-order photonic bandgap. OPTICS EXPRESS 28 (21) : 30736-30747. ScholarBank@NUS Repository. https://doi.org/10.1364/OE.392677 | Abstract: | Integrated mid-infrared sensing offers opportunities for the compact, selective, label-free and non-invasive detection of the absorption fingerprints of many chemical compounds, which is of great scientific and technological importance. To achieve high sensitivity, the key is to boost the interaction between light and analytes. So far, approaches like leveraging the slow light effect, increasing optical path length and enhancing the electric field confinement (f) in the analyte are envisaged. Here, we experimentally investigate a slow light one-dimensional photonic crystal ring resonator operating at high-order photonic bandgap (PBG) in mid-infrared range, which features both strong field confinement in analyte and slow light effect. And the optical path length can also be improved by the resoantor compared with waveguide structure. The characteristics of the first- and second-order bandgap edges are studied by changing the number of patterned periodical holes while keeping other parameters unchanged to confine the bands in the measurement range of our setup between 3.64 and 4.0 µm. Temperature sensitivity of different modes is also experimentally studied, which helps to understand the field confinement. Compared to the fundamental PBG edge modes, the second PBG edge modes show a higher field confinement in the analyte and a comparable group index, leading to larger light-matter interaction. Our work could be used for the design of ultra-sensitive integrated mid-infrared sensors, which have widespread applications including environment monitoring, biosensing and chemical analysis. | Source Title: | OPTICS EXPRESS | URI: | https://scholarbank.nus.edu.sg/handle/10635/189820 | ISSN: | 10944087 | DOI: | 10.1364/OE.392677 |
Appears in Collections: | Staff Publications Elements |
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Demonstration of mid-infrared slow light one-dimensional photonic crystal ring resonator with high-order photonic bandgap.pdf | Accepted version | 2.53 MB | Adobe PDF | OPEN | Published | View/Download |
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