Porous Si-SiO2 UV Microcavities to Modulate the Responsivity of a Broadband Photodetector.

ABSTRACT: Porous Si-SiO2 UV microcavities are used to modulate a broad responsivity photodetector (GVGR-T10GD) with a detection range from 300 to 510 nm. The UV microcavity filters modified the responsivity at short wavelengths, while in the visible range the filters only attenuated the responsivity. All microcavities had a localized mode close to 360 nm in the UV-A range, and this meant that porous Si-SiO2 filters cut off the photodetection range of the photodetector from 300 to 350 nm, where microcavities showed low transmission. In the short-wavelength range, the photons were absorbed and did not contribute to the photocurrent. Therefore, the density of recombination centers was very high, and the photodetector sensitivity with a filter was lower than the photodetector without a filter. The maxim

SUBMITTER: Jimenez-Vivanco MR 

PROVIDER: S-EPMC7075018 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature