Fig. 1: Electrochemical surface-plasmon-resonance sensing principle and experimental demonstration with an gold-coated TFBG optical fiber sensor. | Light: Science & Applications

Fig. 1: Electrochemical surface-plasmon-resonance sensing principle and experimental demonstration with an gold-coated TFBG optical fiber sensor.

From: In situ plasmonic optical fiber detection of the state of charge of supercapacitors for renewable energy storage

Fig. 1

a CV response of the supercapacitor during a polarizing cycle including positive and negative polarities, and the resulting electronic polarizations of Au film: (i and iii) two opposite polarizations at −0.8 V and +0.8 V; (ii) neutral state (0 V). b Spectral response of P-polarized input, gold-coated 18° TFBG for the different electronic polarization states of the electrode; enlarged view (blue inset) of the spectral change of the SPR coupled cladding mode used for monitoring (marked by a red asterisk “*”); and (yellow inset) enlarged view of the spectrum near the core mode (Bragg) reference resonance

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