Search

Simulated transmission spectra for tapered fibers with no taper, one taper and two tapers in the near infrared wavelength range, calculated by Finite-Difference-Time-Domain method are currently presented. Transmission peak positions tend to shift to the shorter wavelength when the taper deformation is added to the fiber or the taper width gets narrower. The thickness sensitivity for the tapered structures with different taper thicknesses is about 2.28e-3 nm·µm−1. There is an interference structure in the electric field distribution images, which reveals in the fiber structures. The transmission spectra for the fiber without taper, one taper and two-tapered structures were simulated in near infrared wavelength by FDTD. The transmission spectra for tlated in near infrared wavelength by FDTD. The sensitivity of the fiber was about 50 nm × RIU−1 and it had better refractive index detection. The tapered fiber can be applied to the bio-chemical sensors and physical deformation testing. [ABSTRACT FROM AUTHOR]

Simulated transmission spectrums and the change of the transmission peak position with the refractive index by the finite-difference time-domain method are present. The considered structure is the two-dimensional metallic square hole and trapezoid hole array, and the change of the transmission peak position with the refractive index can achieve about 1000 nm RIU −1 . In comparison, the sensor properties of the metallic trapezoid hole array is better than that of the metallic square hole array. Meanwhile, the field intensity enhancement and localization of the metallic trapezoid hole are better. Meanwhile, these array structures can extensively apply to biochemical sensor devices design and localized field enhancement device so on. [ABSTRACT FROM AUTHOR]