TY - JOUR
T1 - Fiber-optic meta-tip with multi-sensitivity resonance dips for humidity sensing
AU - Liu, Yin
AU - Chen, Yufeng
AU - Zhou, Shipeng
AU - Huang, Lingling
AU - Wang, Yongtian
AU - Li, Xiaowei
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - In response to the requirements of small effective sensing volume for simultaneous interpreting of resonant peaks with different sensing sensitivities, a surface plasmon resonance (SPR) fiber-optic probe based on non-uniform Au groove array is proposed, which realizes relative humidity (RH) sensing by coating silk fibroin film. The RH meta-tip is mainly composed of multi-mode fiber (MMF), a metasurface, and silk fibroin film. The metasurface is transferred to the end face of the MMF by the “contact and separate” transfer method, and then a layer of silk fibroin is coated on the metasurface by dipping method. Because of the interaction of interference and plasma excitation, the proposed SPR probe has many resonance dips with different refractive index (RI) sensitivities, which has the potential to monitor multiple sensing parameters. Because the RI of the silk fibroin film is directly affected by the external environment RH, the phase matching conditions of the propagating surface plasmon polaritons (SPPs) change accordingly, leading to the shifts in the resonance wavelength of those dips. By further improving the functional integration of the fiber-optic SPR probe, the single-ended sensor paves the way for chemical and biological sensing.
AB - In response to the requirements of small effective sensing volume for simultaneous interpreting of resonant peaks with different sensing sensitivities, a surface plasmon resonance (SPR) fiber-optic probe based on non-uniform Au groove array is proposed, which realizes relative humidity (RH) sensing by coating silk fibroin film. The RH meta-tip is mainly composed of multi-mode fiber (MMF), a metasurface, and silk fibroin film. The metasurface is transferred to the end face of the MMF by the “contact and separate” transfer method, and then a layer of silk fibroin is coated on the metasurface by dipping method. Because of the interaction of interference and plasma excitation, the proposed SPR probe has many resonance dips with different refractive index (RI) sensitivities, which has the potential to monitor multiple sensing parameters. Because the RI of the silk fibroin film is directly affected by the external environment RH, the phase matching conditions of the propagating surface plasmon polaritons (SPPs) change accordingly, leading to the shifts in the resonance wavelength of those dips. By further improving the functional integration of the fiber-optic SPR probe, the single-ended sensor paves the way for chemical and biological sensing.
KW - Fiber-optic sensor
KW - Humidity sensing
KW - Metasurface
KW - Surface plasmon resonance
UR - https://www.scopus.com/pages/publications/85118874022
U2 - 10.1016/j.snb.2021.130957
DO - 10.1016/j.snb.2021.130957
M3 - Article
AN - SCOPUS:85118874022
SN - 0925-4005
VL - 352
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
M1 - 130957
ER -