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Light trapping and surface plasmon enhanced high-performance NIR photodetector.

ABSTRACT: Heterojunctions near infrared (NIR) photodetectors have attracted increasing research interests for their wide-ranging applications in many areas such as military surveillance, target detection, and light vision. A high-performance NIR light photodetector was fabricated by coating the methyl-group terminated Si nanowire array with plasmonic gold nanoparticles (AuNPs) decorated graphene film. Theoretical simulation based on finite element method (FEM) reveals that the AuNPs@graphene/CH3-SiNWs array device is capable of trapping the incident NIR light into the SiNWs array through SPP excitation and coupling in the AuNPs decorated graphene layer. What is more, the coupling and trapping of freely propagating plane waves from free space into the nanostructures, and surface passivation contribute to the high on-off ratio as well.

SUBMITTER: Luo LB

PROVIDER: S-EPMC3904145 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature

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Light trapping and surface plasmon enhanced high-performance NIR photodetector.

Luo Lin-Bao LB Zeng Long-Hui LH Xie Chao C Yu Yong-Qiang YQ Liang Feng-Xia FX Wu Chun-Yan CY Wang Li L Hu Ji-Gang JG

Scientific reports 20140128

Heterojunctions near infrared (NIR) photodetectors have attracted increasing research interests for their wide-ranging applications in many areas such as military surveillance, target detection, and light vision. A high-performance NIR light photodetector was fabricated by coating the methyl-group terminated Si nanowire array with plasmonic gold nanoparticles (AuNPs) decorated graphene film. Theoretical simulation based on finite element method (FEM) reveals that the AuNPs@graphene/CH3-SiNWs arr ...[more]

PMID: 24468857

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