Enhanced photodetection in graphene-integrated photonic crystal cavity
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Englund_Enhanced photodetection.pdf
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1.14 MB
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Author(s)
Shiue, Ren-Jye
Gan, Xuetao
Gao, Yuanda
Li, Luozhou
Yao, Xinwen
Szep, Attila
Walker, Dennis
Hone, James
Englund, Dirk Robert
Date Issued
December 2013
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Shiue, Ren-Jye, Xuetao Gan, Yuanda Gao, Luozhou Li, Xinwen Yao, Attila Szep, Dennis Walker, James Hone, and Dirk Englund. “Enhanced Photodetection in Graphene-Integrated Photonic Crystal Cavity.” Appl. Phys. Lett. 103, no. 24 (2013): 241109. © 2013 AIP Publishing LLC
Version
Final published version
Abstract
We demonstrate the controlled enhancement of photoresponsivity in a graphene photodetector by coupling to slow light modes in a long photonic crystal linear defect cavity. Near the Brillouin zone (BZ) boundary, spectral coupling of multiple cavity modes results in broad-band photocurrent enhancement from 1530 nm to 1540 nm. Away from the BZ boundary, individual cavity resonances enhance the photocurrent eight-fold in narrow resonant peaks. Optimization of the photocurrent via critical coupling of the incident field with the graphene-cavity system is discussed. The enhanced photocurrent demonstrates the feasibility of a wavelength-scale graphene photodetector for efficient photodetection with high spectral selectivity and broadband response.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4839235
