Double microring resonators polymer waveguide for optical biosensing
The potential of double microring resonator polymer waveguide as an optical biosensor was demonstrated. Visible wavelength region at 632 nm is used as a centre wavelength because it is commonly used in biological and chemical sensing for both label and label-free sensing. The double microring resona...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
UPENA Universiti Teknologi MARA Cawangan Pahang
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70461/ http://irep.iium.edu.my/70461/ http://irep.iium.edu.my/70461/1/12-Article%20Text-64-2-10-20181030.pdf |
| Summary: | The potential of double microring resonator polymer waveguide as an optical biosensor was demonstrated. Visible wavelength region at 632 nm is used as a centre wavelength because it is commonly used in biological and chemical sensing for both label and label-free sensing. The double microring resonator waveguide structure is simulated using COMSOL Multiphysics optical design and analysis software. The results show that there is a transmission drop with a 3 dB bandwidth of 631.4 nm when the surrounding refractive index is 1.33. The specific wavelength (output transmission) is shifted to 674.6 nm when the surrounding medium into 1.43, in order to imitate the bioanalytes solution. According to simulation result, the wavelength shift was approximately 43.2 nm for 0.1 increasing of surrounding refractive index. The double microring resonator polymer waveguide was fabricated by using electron beam lithography. Then, the fabricated devices were integrated into microfluidic systems in order to validate the wavelength shift. From the experiments, the wavelength shift occurred approximately 32.3 nm over 0.1 increment of refractive index. Thus both simulation and experimental results strongly indicate that double microring resonator polymer waveguide structure at visible wavelength region have a potential for label or label-free optical biosensing applications. |
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