期刊
OPTICS EXPRESS
卷 23, 期 22, 页码 28728-28735出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.028728
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资金
- German Science Foundation DFG [Wi3114/3-1, Ga501/11-1]
- U.S. ONR [N000141310865]
- U.S. NSF [ECCS 1309750]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1309750] Funding Source: National Science Foundation
Graphene has unique optical and electronic properties that make it attractive as an active material for broadband ultrafast detection. We present here a graphene-based detector that shows 40-picosecond electrical rise time over a spectral range that spans nearly three orders of magnitude, from the visible to the far-infrared. The detector employs a large area graphene active region with interdigitated electrodes that are connected to a log-periodic antenna to improve the long-wavelength collection efficiency, and a silicon carbide substrate that is transparent throughout the visible regime. The detector exhibits a noise-equivalent power of approximately 100 mu W.Hz(-1/2) and is characterized at wavelengths from 780 nm to 500 mu m. (C) 2015 Optical Society of America
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