A Novel Demultiplexing Photodetector with Integrated Vertical Conical Structure

Qing Liu; Yong Qing Huang; Xiao Feng Duan; Xin Ye Fan; Xiao Min Ren; Qi Wang; Shi Wei Cai; Xia Zhang

doi:10.4028/www.scientific.net/AMR.652-654.677

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654A Novel Demultiplexing Photodetector with...

A Novel Demultiplexing Photodetector with Integrated Vertical Conical Structure

Abstract:

A novel demultiplexing photodetector which consists of a filtering cavity and a conical absorption cavity is proposed. The filtering cavity is formed by four coupled （Fabry-Pérot）F-P cavities, which can realize flat-top and steep-edge spectral response. The top mirror of the absorption cavity is designed to be conical, which can increase the times of light reflection. Then the quantum efficiency is improved. Through the theoretical analysis and simulation, the peak quantum efficiency of the photodetector is 88.87% around 1550nm. In addition, this photodetector has good performance in the flat-top and steep-edge spectral response: the 0.5dB bandwidth is 0.4nm , the 3dB bandwidth is 0.56nm and the 20dB bandwidth is 0.98nm.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

677-682

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.677

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Online since:

January 2013

Authors:

Qing Liu, Yong Qing Huang, Xiao Feng Duan, Xin Ye Fan, Xiao Min Ren, Qi Wang, Shi Wei Cai, Xia Zhang

Keywords:

Flat-Top and Steep-Edge Spectral Response, Photodetector, Quantum Efficiency, Vertical Conical Structure

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