A polarization-insensitive fishnet/spacer/mirror plasmonic absorber for hot electron photodetection application

Zhiqiang Yang; Kang Du; Wending Zhang; Soojin Chua; Ting Mei

doi:10.3788/COL202018.052402

A polarization-insensitive fishnet/spacer/mirror plasmonic absorber for hot electron photodetection application

Zhiqiang Yang, Kang Du, Wending Zhang, Soojin Chua, Ting Mei

School of Physical Science and Technology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A polarization-insensitive plasmonic absorber is designed consisting of Au fishnet structures on a TiO₂ spacer/Ag mirror. The fishnet structures excite localized surface plasmon and generate hot electrons from the absorbed photons, while the TiO₂ layer induces Fabry-Perot resonance, and the Ag mirror acts as a back reflector. Through optimizing the TiO₂ layer thickness, numerical simulation shows that 97% of the incident light is absorbed in the Au layer. The maximum responsivity and external quantum efficiency of the device can approach 5 mA/W and ∼1%, respectively, at the wavelength of 700 nm.

Original language	English
Article number	052402
Journal	Chinese Optics Letters
Volume	18
Issue number	5
DOIs	https://doi.org/10.3788/COL202018.052402
State	Published - 10 May 2020

Keywords

Fabry-Perot resonance
Internal photoemission
Plasmonic absorber
Surface plasmon

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title = "A polarization-insensitive fishnet/spacer/mirror plasmonic absorber for hot electron photodetection application",

abstract = "A polarization-insensitive plasmonic absorber is designed consisting of Au fishnet structures on a TiO2 spacer/Ag mirror. The fishnet structures excite localized surface plasmon and generate hot electrons from the absorbed photons, while the TiO2 layer induces Fabry-Perot resonance, and the Ag mirror acts as a back reflector. Through optimizing the TiO2 layer thickness, numerical simulation shows that 97% of the incident light is absorbed in the Au layer. The maximum responsivity and external quantum efficiency of the device can approach 5 mA/W and ∼1%, respectively, at the wavelength of 700 nm.",

keywords = "Fabry-Perot resonance, Internal photoemission, Plasmonic absorber, Surface plasmon",

author = "Zhiqiang Yang and Kang Du and Wending Zhang and Soojin Chua and Ting Mei",

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doi = "10.3788/COL202018.052402",

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T1 - A polarization-insensitive fishnet/spacer/mirror plasmonic absorber for hot electron photodetection application

AU - Yang, Zhiqiang

AU - Du, Kang

AU - Zhang, Wending

AU - Chua, Soojin

AU - Mei, Ting

PY - 2020/5/10

Y1 - 2020/5/10

N2 - A polarization-insensitive plasmonic absorber is designed consisting of Au fishnet structures on a TiO2 spacer/Ag mirror. The fishnet structures excite localized surface plasmon and generate hot electrons from the absorbed photons, while the TiO2 layer induces Fabry-Perot resonance, and the Ag mirror acts as a back reflector. Through optimizing the TiO2 layer thickness, numerical simulation shows that 97% of the incident light is absorbed in the Au layer. The maximum responsivity and external quantum efficiency of the device can approach 5 mA/W and ∼1%, respectively, at the wavelength of 700 nm.

AB - A polarization-insensitive plasmonic absorber is designed consisting of Au fishnet structures on a TiO2 spacer/Ag mirror. The fishnet structures excite localized surface plasmon and generate hot electrons from the absorbed photons, while the TiO2 layer induces Fabry-Perot resonance, and the Ag mirror acts as a back reflector. Through optimizing the TiO2 layer thickness, numerical simulation shows that 97% of the incident light is absorbed in the Au layer. The maximum responsivity and external quantum efficiency of the device can approach 5 mA/W and ∼1%, respectively, at the wavelength of 700 nm.

KW - Fabry-Perot resonance

KW - Internal photoemission

KW - Plasmonic absorber

KW - Surface plasmon

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DO - 10.3788/COL202018.052402

M3 - 文章

AN - SCOPUS:85087331064

SN - 1671-7694

VL - 18

JO - Chinese Optics Letters

JF - Chinese Optics Letters

IS - 5

M1 - 052402

ER -

A polarization-insensitive fishnet/spacer/mirror plasmonic absorber for hot electron photodetection application

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Keywords

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