A Highly-Sensitive Temperature-Sensor Based on a Microfiber Knot-Resonator Packaged in Polydimethylsiloxane

In this paper, a microfiber knot resonator (MKR) was encapsulated in polydimethylsiloxane (PDMS), and its capability to sense temperature experimentally evaluated. A very high sensitivity of -12 nm/°C recorded for the MKR device, with diameter 2μm ring 95 μm. However, light-loss significant small MKR. We attribute low ratio ring-length microfiber-diameter. stable temperature-sensing performance negative 8.48 were obtained MKRs 3 μm mm. device non-uniform (in diameter) also fabricated studied. This compact miniature temperature-probe will be promising candidate wearable devices.