氮化硅
材料科学
石墨烯
光电探测器
光电子学
带宽(计算)
化学气相沉积
硅
波导管
共面波导
氮化物
纳米技术
电信
计算机科学
微波食品加热
图层(电子)
作者
Yun Gao,Hon Ki Tsang,Chester Shu
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2018-01-01
卷期号:10 (46): 21851-21856
被引量:23
摘要
We demonstrate a high-speed chemical vapor deposited graphene-on-silicon nitride waveguide photodetector. The device is designed with grating-like metal contact to reduce the channel spacing. Benefiting from the narrow channel spacing, a calculated transit-time-limited bandwidth of 111 GHz is derived. The resistance-capacitance-limited bandwidth is also improved due to the small relative permittivity of silicon nitride. At a wavelength of 1550 nm, we measured an electro-optic bandwidth of 38 GHz under zero bias and an intrinsic responsivity of 13 mA W-1 at 0.1 V reverse bias with a 6 μm detection length.
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