We propose a graphene embedded highly sensitive double D-shaped photonic crystal fiber (PCF) based plasmonic sensor for multi-analyte detection. The double D-shaped PCF is fabricated using the standard stack-and-draw method and utilizes the scanning electron microscope (SEM) image for numerical investigations. The double D-shape structure facilitates simultaneous multi-analyte detection capability. The proposed sensor exhibits the maximum wavelength and amplitude sensitivities of 14,000 nm/RIU and 1,922 RIU-1 for x-polarized mode respectively. Due to its highly sensitive response and multi-analyte detection capability, the proposed sensor will be a suitable candidate for medical diagnostics, biochemical, and organic chemical detection.
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