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Proceedings Paper

RCE photodetector with cascaded grating structure
Author(s): Xu Zhang; Yongqing Huang; Xiaomin Ren; Hui Huang; Qi Wang
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Paper Abstract

New type of photodetector with cascaded waveguide grating filters as bottom reflection mirror is proposed. Greatly improved spectral response is shown to follow by the integration of waveguide grating into classical thin-film homogeneous layers. Calculation results for single grating, cascaded-double grating and cascaded-triple grating structure are demonstrated. An increasing rectangular spectral response is obtained by cascade two or three grating filters. Compared with traditional photodetector with distributed Bragg reflectors (DBRs), this new type of photodetector with the same materials require significantly fewer layers while maintaining narrow flat-top response, high peak efficiency and low sideband reflectance.

Paper Details

Date Published: 3 December 2009
PDF: 7 pages
Proc. SPIE 7631, Optoelectronic Materials and Devices IV, 76311O (3 December 2009); doi: 10.1117/12.850710
Show Author Affiliations
Xu Zhang, Beijing Univ. of Posts and Telecommunications (China)
Yongqing Huang, Beijing Univ. of Posts and Telecommunications (China)
Xiaomin Ren, Beijing Univ. of Posts and Telecommunications (China)
Hui Huang, Beijing Univ. of Posts and Telecommunications (China)
Qi Wang, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 7631:
Optoelectronic Materials and Devices IV
Jian-Jun He; Guang-Hua Duan; Fumio Koyama; Ming C. Wu, Editor(s)

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