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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 10 — Apr. 1, 2012
  • pp: 1487–1494

Si-based tunable flattop photodetector with a stepped Fabry–Perot cavity

Wei Wang, Yongqing Huang, Xiaofeng Duan, Jia Tian, Jingwei Guo, and Xiaomin Ren  »View Author Affiliations


Applied Optics, Vol. 51, Issue 10, pp. 1487-1494 (2012)
http://dx.doi.org/10.1364/AO.51.001487


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Abstract

This paper presents the design and analysis of a Si-based tunable flattop photodetector realized by the introduction of a stepped Fabry–Perot cavity, which can be thermally tuned via applying tuning power on its tuning electrode. By using a transfer matrix method, the spectral response of the photodetector is simulated in detail, indicating a flattop line shape can be achieved with an optimum step height. A trade-off residing in this device between the free spectrum range and the ease of fabrication of step height is also revealed and analyzed. In the final design of the photodetector, 1 dB linewidth of 0.5 nm, 3 dB linewidth of 0.8 nm, 6 dB linewidth of 1.2 nm, peak quantum efficiency of 40%, tuning efficiency of 91 mW/nm are theoretically obtained. We discuss the epitaxial growth and fabrication of the photodetector in the end, exhibiting the mature technique available for this device.

© 2012 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(130.3120) Integrated optics : Integrated optics devices
(230.0250) Optical devices : Optoelectronics
(230.4170) Optical devices : Multilayers
(230.5160) Optical devices : Photodetectors

ToC Category:
Optical Devices

History
Original Manuscript: November 18, 2011
Revised Manuscript: December 25, 2011
Manuscript Accepted: December 27, 2011
Published: March 26, 2012

Citation
Wei Wang, Yongqing Huang, Xiaofeng Duan, Jia Tian, Jingwei Guo, and Xiaomin Ren, "Si-based tunable flattop photodetector with a stepped Fabry–Perot cavity," Appl. Opt. 51, 1487-1494 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-10-1487

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