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We propose a plasmonic gold nanodipole array on silicon, forming a Schottky contact thereon, and covered by water.
The behavior of this array under normal excitation has been extensively investigated. Trends have been found and
confirmed by identification of the mode propagating in nanodipoles and its properties. This device can be used to detect
infrared radiation below the bandgap energy of the substrate via internal photoelectric effect (IPE). Also we estimate its
responsivity and detection limit. Finally, we assess the potential of the structure for bulk and surface (bio) chemical
sensing. Based on modal results an analytical model has been proposed to estimate the sensitivity of the device. Results
show a good agreement between numerical and analytical interpretations.
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Mohammad Alavirad, Saba Siadat Mousavi, Langis Roy, Pierre Berini, "Schottky-contact plasmonic rectenna for biosensing," Proc. SPIE 8915, Photonics North 2013, 89151D (11 October 2013); https://doi.org/10.1117/12.2036203