Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions

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Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions
Title:
Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions
Journal Title:
Science Advances
Publication Date:
23 November 2022
Citation:
Ho, J., Dong, Z., Leong, H. S., Zhang, J., Tjiptoharsono, F., Daqiqeh Rezaei, S., Goh, K. C. H., Wu, M., Li, S., Chee, J., Wong, C. P. Y., Kuznetsov, A. I., & Yang, J. K. W. (2022). Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions. Science Advances, 8(47). https://doi.org/10.1126/sciadv.add3868
Abstract:
Digital camera sensors use color filters on photodiodes to achieve color selectivity. As the color filters and photosensitive silicon layers are separate elements, these sensors suffer from optical cross-talk, which sets limits to the minimum pixel size. Here, we report hybrid silicon-aluminum nanostructures in the extreme limit of zero distance between color filters and sensors. This design could essentially achieve submicrometer pixel dimensions and minimize the optical cross-talk arising from tilt illuminations. The designed hybrid silicon-aluminum nanostructure has dual functionalities. Crucially, it supports a hybrid Mie-plasmon resonance of magnetic dipole to achieve color-selective light absorption, generating electron hole pairs. Simultaneously, the silicon-aluminum interface forms a Schottky barrier for charge separation and photodetection. This design potentially replaces the traditional dye-based filters for camera sensors at ultrahigh pixel densities with advanced functionalities in sensing polarization and directionality, and UV selectivity via interband plasmons of silicon.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the A*STAR - Career Development Award
Grant Reference no. : C210112019

This research / project is supported by the A*STAR - AME Individual Research Grants (IRG)
Grant Reference no. : A20E5c0093

This research / project is supported by the A*STAR - SERC Pharos grant 1527300025
Grant Reference no. : 1527300025

This research / project is supported by the A*STAR - MTC Programmatic grant
Grant Reference no. : M21J9b0085

This research / project is supported by the A*STAR - MTC Individual Research Grants (IRG)
Grant Reference no. : M21K2c0116

This research / project is supported by the A*STAR - MTC Young Individual Research Grants (YIRG)
Grant Reference no. : M21K3c0127

This research / project is supported by the A*STAR - SERC Pharos grant
Grant Reference no. : 1527000016

This research / project is supported by the A*STAR - AME Young Individual Research Grants (YIRG)
Grant Reference no. : A2084c0179

This research / project is supported by the National Research Foundation (NRF) - Competitive Research Programme
Grant Reference no. : NRF-CRP20-2017-0001

This research / project is supported by the National Research Foundation (NRF) - NRF Investigator
Grant Reference no. : NRF-NRFI06-2020-0005
Description:
ISSN:
2375-2548