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Journal of Photonics for Energy

Ultrathin continuous lossy metal film for broadband light absorption and hot electron collection
Author(s): Long Wen; Qin Chen
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Paper Abstract

A broadband perfect light absorption scheme relying on planar layers of lossy metallic and semiconductor films without structure pattering for hot electron photodetection is proposed and demonstrated. The nontrivial reflection phase shift occurring in the ultrathin lossy metal film is responsible for the strong resonance effects of the metal–semiconductor–metal (M-S-M) structures. Broadband and perfect light absorption is demonstrated experimentally for the platinum (Pt)—titanium dioxide (TiO2)—aluminum (Al) absorber, in which the ultrathin (10 nm) Pt layer electrically serves as the hot electron emitter. Under the monochromatic light illumination, the proposed M-S-M diode shows a clear hot-electron-based photoresponse.

Paper Details

Date Published: 12 July 2016
PDF: 8 pages
J. Photon. Energy 6(4) 042503 doi: 10.1117/1.JPE.6.042503
Published in: Journal of Photonics for Energy Volume 6, Issue 4
Show Author Affiliations
Long Wen, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
Qin Chen, Suzhou Institute of Nano-Tech and Nano-Bionics (China)

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