Distributed bolometric effect in optical antennas and resonant structures

Abstract

Universidad Autonoma de San Luis Potosi, Coordinacion para la Innovacion y,Aplicacion de la Ciencia y la Tecnologia, San Luis Potosi, Mexico 78210Abstract. Nanoantennas coupled to nanobolometers have been used as detectors of opticalradiation. They are typically manufactured using two different materials: one for the nano-antenna and another for the nanobolometer. However, those metals used to fabricate nano-antennas also present a bolometric response. Therefore, antenna-coupled detectors using thebolometriceffectdistributedalongthedevicewerecomparedwiththeresultspreviouslyreportedfor nanobolometers coupled with dipole antennas in the infrared regime. We modeled therelevant physical mechanisms and also simulated the simple case of a dipole antenna usinga multi-physics computational tool. The simulation results were compared with experimentalresults. The advantage in performance when using a dedicated material to enhance the bolo-metric effect, is balanced with the easiness of the fabrication of resonant structures involvingonly one material where the bolometric effect is distributed along the device.