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Article Dans Une Revue Applied Physics Letters Année : 2018

Noise characterization of patch antenna THz photodetectors

Résumé

Current noise fluctuations have been investigated in terahertz (THz) quantum well photodetectors embedded in antenna-coupled photonic architectures and compared with standard substrate-coupled mesa detectors. The noise measurements give a value of the photoconductive gain that is in excellent agreement with that extracted from previous responsivity calibrations. Moreover, our results confirm that the noise equivalent power (NEP) of the antenna-coupled devices is of the order of 0.2 pW/Hz0.5. This low NEP value and the wide band frequency response (∼GHz) of the detectors are ideal figures for the development of heterodyne receivers that are, at present, a valuable technological solution to overcome the current limitation of THz sensors.
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hal-02403210 , version 1 (27-05-2022)

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D. Palaferri, Y. Todorov, D. Gacemi, S Barbieri, L. Li, et al.. Noise characterization of patch antenna THz photodetectors. Applied Physics Letters, 2018, 113 (16), pp.161105. ⟨10.1063/1.5051580⟩. ⟨hal-02403210⟩
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