We propose a novel structure and unique sensing mechanism bio-chemical sensor which is fabricated by a polymer long-period waveguide grating with the detection liquid directly as the waveguide cladding.Quantitative de...We propose a novel structure and unique sensing mechanism bio-chemical sensor which is fabricated by a polymer long-period waveguide grating with the detection liquid directly as the waveguide cladding.Quantitative detection is realized from analyzing the output absorption spectrum and resonant wavelength shift related to the liquid detection concentration.The proposed polymer long-period waveguide grating based liquid refractive-index sensor is developed experimentally,the high sensitivity of 1.01×10^4nm/RIU is achieved,and the temperature stability coefficient is 1.47nm/℃.Theoretically and experimentally,this work has been demonstrated to have potential application in chemical and biological detections and may provide an important technical support for solving today's increasingly serious civil problems such as food safety and drug safety, which will also have the important scientific significance and application prospects.展开更多
Long-period waveguide grating based filters have attracted attention due to their flexible fabrication,a variety of materials and structures,low back reflection,low insertion loss,and excellent performance in the tuni...Long-period waveguide grating based filters have attracted attention due to their flexible fabrication,a variety of materials and structures,low back reflection,low insertion loss,and excellent performance in the tuning range and temperature sensitivity.To our knowledge,for the first time,a two-segment polymer long-period waveguide grating was cascaded to implement a filter with a narrower bandwidth.Experimental results showed that the device had a maximum extinction ratio of 24 dB at 1577 nm,and the 12 dB bandwidth was 10 nm.The temperature sensitivity of the fabricated device was 1.79 nm/℃.展开更多
We analyze and explore the potential of using a polymer horizontal slot waveguide as light-analyte interactive region to implement a low-cost and highly sensitive liquid refractive index sensor.Numerical analysis show...We analyze and explore the potential of using a polymer horizontal slot waveguide as light-analyte interactive region to implement a low-cost and highly sensitive liquid refractive index sensor.Numerical analysis shows that the optimized polymer horizontal slot waveguide is able to realize high waveguide sensitivity.With the optimized horizontal slot waveguide,polymer liquid refractive index sensors based on Mach-Zehnder interferometer(MZI)and microring resonator(MRR)are then investigated numerically,and the results show that the MZI-based sensor can achieve high sensitivity of 17024 nm/RIU and low limit of detection(LOD)of 1.76´10^(-6) RIU while the MRR-based sensor can achieve the sensitivity of 177 nm/RIU and the LOD of 1.69´10^(-4) RIU with a very small footprint.Compared with the sensors employing conventional silicon or silicon nitride vertical slot waveguide,the sensors employing polymer horizontal slot waveguide exhibit comparable performances but simpler and lower fabrication costs.展开更多
基金the National Natural Science Foundation of China(NSFC)(Grant No.61505020)the Fundamental Research Funds for the Central Universities(Grant No. ZYGX2016J005).
文摘We propose a novel structure and unique sensing mechanism bio-chemical sensor which is fabricated by a polymer long-period waveguide grating with the detection liquid directly as the waveguide cladding.Quantitative detection is realized from analyzing the output absorption spectrum and resonant wavelength shift related to the liquid detection concentration.The proposed polymer long-period waveguide grating based liquid refractive-index sensor is developed experimentally,the high sensitivity of 1.01×10^4nm/RIU is achieved,and the temperature stability coefficient is 1.47nm/℃.Theoretically and experimentally,this work has been demonstrated to have potential application in chemical and biological detections and may provide an important technical support for solving today's increasingly serious civil problems such as food safety and drug safety, which will also have the important scientific significance and application prospects.
文摘Long-period waveguide grating based filters have attracted attention due to their flexible fabrication,a variety of materials and structures,low back reflection,low insertion loss,and excellent performance in the tuning range and temperature sensitivity.To our knowledge,for the first time,a two-segment polymer long-period waveguide grating was cascaded to implement a filter with a narrower bandwidth.Experimental results showed that the device had a maximum extinction ratio of 24 dB at 1577 nm,and the 12 dB bandwidth was 10 nm.The temperature sensitivity of the fabricated device was 1.79 nm/℃.
基金This work is supported by the National Natural Science Foundation of China(NSFC)(Grant No.61505020)the Opened Fund of the State Key Laboratory of Integrated Optoelectronics(Grant No.IOSKL2018KF12).
文摘We analyze and explore the potential of using a polymer horizontal slot waveguide as light-analyte interactive region to implement a low-cost and highly sensitive liquid refractive index sensor.Numerical analysis shows that the optimized polymer horizontal slot waveguide is able to realize high waveguide sensitivity.With the optimized horizontal slot waveguide,polymer liquid refractive index sensors based on Mach-Zehnder interferometer(MZI)and microring resonator(MRR)are then investigated numerically,and the results show that the MZI-based sensor can achieve high sensitivity of 17024 nm/RIU and low limit of detection(LOD)of 1.76´10^(-6) RIU while the MRR-based sensor can achieve the sensitivity of 177 nm/RIU and the LOD of 1.69´10^(-4) RIU with a very small footprint.Compared with the sensors employing conventional silicon or silicon nitride vertical slot waveguide,the sensors employing polymer horizontal slot waveguide exhibit comparable performances but simpler and lower fabrication costs.
