Plasmon resonance based gold nanoparticle doped optical fibre strain sensing

• The spectral peak shift of the plasmon resonance an optical fibre containing gold NPs under axial strain was analysed. By choosing different fibres or properties NPs, tunable highly sensitive sensing can be achieved. method may used as auxiliary detection along with distributed optic sensing. Strain-based structural health monitoring (SHM) relies on high performance methods. Gold nanoparticle (NP) doped sensors not only have potential to increase intensity backscattered signal noise ratio but also peaks in visible light range. for In this paper, A modified Lorentz-Drude (LD) model T-matrix and shifts spheroidal were calculated. An approximate analytical expression derived faster calculation. modelling presented paper shows that change wavelength related refractive index (RI) strain, shape NP, RI NP. observed experimentally adhesive compression. analysed at fibres, 1.35, 1.45, 1.55 1.65 respectively, order cover range fused silica some polymer materials. results confirm applied induce by NPs. a has tuned, which