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- W3048130245 abstract "Abstract We investigate the generation of electrical signals by suspended thermoelectrically coupled nanoantennas (TECNAs) above a quasi-spherical reflector cavity in response to rapidly changing long-wave infrared radiation. These sensors use a resonant nanoantenna to couple the IR energy to a nanoscale thermocouple. They are positioned over a cavity, etched into the Si substrate, that provides thermal isolation and is designed as an optical element to focus the IR radiation to the antenna. We study the frequency-dependent response of such TECNAs to amplitude-modulated 10.6 μm IR signals. We experimentally demonstrate response times on the order of 3 μs, and a signal bandwidth of about 300 kHz. The observed electrical response is in excellent correlation with finite element method simulations based on the thermal properties of nanostructures. Both experiments and simulations show a key trade-off between sensitivity and response time for such structures and provide solutions for specific target applications." @default.
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- W3048130245 date "2020-08-10" @default.
- W3048130245 modified "2023-10-16" @default.
- W3048130245 title "Nanoantenna-based ultrafast thermoelectric long-wave infrared detectors" @default.
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- W3048130245 doi "https://doi.org/10.1038/s41598-020-70062-6" @default.
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