%0 Journal Article %1 noauthororeditor %A Pertsch, Patrick %A Kullock, René %A Gabriel, Vinzenz %A Zurak, Luka %A Emmerling, Monika %A Hecht, Bert %D 2022 %J arxiv %K experiment nano-optics near-field photodetectors plasmon tunable %N 13978 %R https://doi.org/10.48550/arXiv.2204.13978 %T Tunable nano-plasmonic photodetectors %V 2204 %X Visible and infrared photons can be detected with a broadband response via the internal photoeffect. By using plasmonic nanostructures, i.e. nanoantennas, wavelength selectivity can be introduced to such detectors through geometry-dependent resonances. Also, additional functionality, like electronic responsivity switching and polarization detection have been realized. However, previous devices consisted of large arrays of nanostructures to achieve detectable photocurrents. Here we show that this concept can be scaled down to a single antenna level, resulting in detector dimensions well below the resonance wavelength of the device. Our design consists of a single electrically-connected plasmonic nanoantenna covered with a wide-bandgap semiconductor allowing broadband photodetection in the VIS/NIR via injection of hot carriers. We demonstrate electrical switching of the color sensitivity as well as polarization detection. Our results hold promise for the realization of ultra small, highly integratable photodetectors with advanced functionality.

@article{noauthororeditor, abstract = {Visible and infrared photons can be detected with a broadband response via the internal photoeffect. By using plasmonic nanostructures, i.e. nanoantennas, wavelength selectivity can be introduced to such detectors through geometry-dependent resonances. Also, additional functionality, like electronic responsivity switching and polarization detection have been realized. However, previous devices consisted of large arrays of nanostructures to achieve detectable photocurrents. Here we show that this concept can be scaled down to a single antenna level, resulting in detector dimensions well below the resonance wavelength of the device. Our design consists of a single electrically-connected plasmonic nanoantenna covered with a wide-bandgap semiconductor allowing broadband photodetection in the VIS/NIR via injection of hot carriers. We demonstrate electrical switching of the color sensitivity as well as polarization detection. Our results hold promise for the realization of ultra small, highly integratable photodetectors with advanced functionality.}, added-at = {2022-05-02T15:58:34.000+0200}, author = {Pertsch, Patrick and Kullock, René and Gabriel, Vinzenz and Zurak, Luka and Emmerling, Monika and Hecht, Bert}, biburl = {https://www.bibsonomy.org/bibtex/2da42db642ac184bf7c5e87878b4242c8/ep5optics}, doi = {https://doi.org/10.48550/arXiv.2204.13978}, interhash = {4eac8d8c980e3c7c6e75d60144cc7c66}, intrahash = {da42db642ac184bf7c5e87878b4242c8}, journal = {arxiv}, keywords = {experiment nano-optics near-field photodetectors plasmon tunable}, number = 13978, timestamp = {2022-05-02T16:04:14.000+0200}, title = {Tunable nano-plasmonic photodetectors}, volume = 2204, year = 2022 }