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High-sensitivity transparent photoconductors in voltage-controlled silicon waveguides.
- Source :
-
Optics letters [Opt Lett] 2022 Mar 15; Vol. 47 (6), pp. 1327-1330. - Publication Year :
- 2022
-
Abstract
- On-chip optical power monitors are essential elements to calibrate, stabilize, and reconfigure photonic integrated circuits. Many applications require in-line waveguide detectors, where a trade-off has to be found between large sensitivity and high transparency to the guided light. In this work, we demonstrate a transparent photoconductor integrated on standard low-doped silicon-on-insulator waveguides that reaches a photoconductive gain of more than 10 <superscript>6</superscript> and an in-line sensitivity as high as -60 dBm. This performance is achieved by compensating the effect of electric charges in the cladding oxide through a bias voltage applied to the chip substrate or locally through a gate electrode on top of the waveguide, allowing one to tune on demand the conductivity of the core to the optimum level.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 47
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 35290305
- Full Text :
- https://doi.org/10.1364/OL.449416