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arXiv 0710.1264cond-mat.mtrl-sci
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光控碳纳米管晶体管

Photo-gating Carbon Nanotube Transistors

Matthew S. Marcus, J. M. Simmons, O. M. Castellini, R. J. Hamers, M. A. Eriksson

摘要:

碳纳米管晶体管的光电测量已经显示出对入射光的各种各样的灵敏度。直接光电流过程与许多外在机制竞争。在这里,我们表明,可见光吸收在硅基板产生的光电压,可以电门的纳米管设备。由改变的栅极电压引起的光电流可以显著大于由于在纳米管中直接产生电子-空穴对引起的光电流。在这些设备中的光电门的主导地位证实了所产生的光电流的功率和位置的依赖性。功率依赖性是强烈的非线性和光电流测量通过该设备,即使当激光照射到1毫米的纳米管。

英文摘要:

Optoelectronic measurements of carbon nanotube transistors have shown a wide variety of sensitivites to the incident light. Direct photocurrent processes compete with a number of extrinsic mechanisms. Here we show that visible light absorption in the silicon substrate generates a photovoltage that can electrically gate the nanotube device. The photocurrent induced by the changing gate voltage can be significantly larger than that due to direct electron-hole pair generation in the nanotube. The dominance of photogating in these devices is confirmed by the power and position dependence of the resulting photocurrent. The power dependence is strongly non-linear and photocurrents are measured through the device even when the laser illuminates up to 1~mm from the nanotube.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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