Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions

Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions

Science Advances

10.1126/sciadv.add3868

http://dx.doi.org/10.1126/sciadv.add3868

Jinfa Ho, Zhaogang Dong, Hai Sheng Leong, Jun Zhang, Febiana Tjiptoharsono, Soroosh Daqiqeh Rezaei, Ken Choon Hwa Goh, Mengfei Wu, Shiqiang Li, Jingyee Chee, Calvin Pei Yu Wong, Arseniy I. Kuznetsov, Joel K. W. Yang

Multidisciplinary

23 November 2022

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

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.

Attribution 4.0 International (CC BY 4.0)

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

https://oar.a-star.edu.sg/communities-collections/articles/19525

2375-2548

Institute of Materials Research and Engineering

https://doi.org/10.1126/sciadv.add3868