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Jimenéz-Vivanco MR, García G, Carrillo J, Morales-Morales F, Coyopol A, Gracia M, Doti R, Faubert J, Lugo JE. Porous Si-SiO 2 UV Microcavities to Modulate the Responsivity of a Broadband Photodetector. NANOMATERIALS 2020; 10:nano10020222. [PMID: 32012926 PMCID: PMC7075018 DOI: 10.3390/nano10020222] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 01/07/2023]
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 maximum transmission measured at the localized mode (between 356 and 364 nm) was dominant in the UV-A range and enabled the flow of high energy photons. Moreover, the filters favored light transmission with a wavelength from 390 nm to 510 nm, where photons contributed to the photocurrent. Our filters made the photodetector more selective inside the specific UV range of wavelengths. This was a novel result to the best of our knowledge.
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Affiliation(s)
- María R. Jimenéz-Vivanco
- Semiconductor Devices Research Center, ICUAP, BUAP, Ciudad Universitaria, Puebla Pue. C.P. 72570, Mexico; (M.R.J.-V.); (G.G.); (J.C.); (A.C.)
| | - Godofredo García
- Semiconductor Devices Research Center, ICUAP, BUAP, Ciudad Universitaria, Puebla Pue. C.P. 72570, Mexico; (M.R.J.-V.); (G.G.); (J.C.); (A.C.)
| | - Jesús Carrillo
- Semiconductor Devices Research Center, ICUAP, BUAP, Ciudad Universitaria, Puebla Pue. C.P. 72570, Mexico; (M.R.J.-V.); (G.G.); (J.C.); (A.C.)
| | - Francisco Morales-Morales
- Optics Research Center, A.C., Loma del Bosque 115, Col. Lomas del Campestre León, León C.P. 37150, Gto, Mexico;
| | - Antonio Coyopol
- Semiconductor Devices Research Center, ICUAP, BUAP, Ciudad Universitaria, Puebla Pue. C.P. 72570, Mexico; (M.R.J.-V.); (G.G.); (J.C.); (A.C.)
| | - Miguel Gracia
- IFUAP, Benemérita Universidad Autónoma de Puebla, Ed. IF2, Col. San Manuel, Puebla C.P. 72570, Mexico;
| | - Rafael Doti
- Faubert Lab, School of Optometry, University de Montreal, Montreal, QC H3T 1P1, Canada; (R.D.); (J.F.)
| | - Jocelyn Faubert
- Faubert Lab, School of Optometry, University de Montreal, Montreal, QC H3T 1P1, Canada; (R.D.); (J.F.)
| | - J. Eduardo Lugo
- Faubert Lab, School of Optometry, University de Montreal, Montreal, QC H3T 1P1, Canada; (R.D.); (J.F.)
- Correspondence: ; Tel.: +1-514-343-6111 (ext. 1685)
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