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Nanoantennas coupled to nanobolometers have been used as detectors of optical radiation. They are typically manufactured using two different materials: one for the nanoantenna and another for the nanobolometer. However, those metals used to fabricate nanoantennas also present a bolometric response. Therefore, antenna-coupled detectors using the bolometric effect distributed along the device were compared with the results previously reported for nanobolometers coupled with dipole antennas in the infrared regime. We modeled the relevant physical mechanisms and also simulated the simple case of a dipole antenna using a multi-physics computational tool. The simulation results were compared with experimental results. The advantage in performance when using a dedicated material to enhance the bolometric effect, is balanced with the easiness of the fabrication of resonant structures involving only one material where the bolometric effect is distributed along the device.
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Alexander Cuadrado, Javier Alda, Francisco J. Gonzalez, "Distributed bolometric effect in optical antennas and resonant structures," J. Nanophoton. 6(1) 063512 (2 July 2012) https://doi.org/10.1117/1.JNP.6.063512