Plasmonic Nano-antennas Enhanced Near-infrared Non-invasive Glucose Detection

Non-invasive blood glucose monitoring based on optical sensors had become strong aspirations of the diabetics, resulting from no-painful signal sampling. However, noise signals in optical sensors coming from complex environmental leading to lack sensitivity and selectivity. Here, a simple device architecture with 15nm-gap plasmonic dimer arrays was proposed to achieve the selective enhancement for glucose detection. The results showed that the linear relationships between photocurrent and glucose concentrations at the wavelength of 880 nm can be obtained in the devices with 180 nm dimer arrays. Simulation and fabrication of reasonable plasmonic antennas on flexible substrate under bending angle status strongly support the huge potentials for the integration of plasmonic structures into wearable blood glucose devices.