期刊
NANO LETTERS
卷 12, 期 6, 页码 3097-3100出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl300975h
关键词
Carbon nanotubes; quantum dots; terahertz detectors; nonequilibrium cooling; photon-assisted tunneling
类别
资金
- AFOSR [FA9550-09-1-0697, FA9550-09-1-0685]
- DOE [DE-SC0005436]
- U.S. Department of Energy (DOE) [DE-SC0005436] Funding Source: U.S. Department of Energy (DOE)
Terahertz technology has recently emerged as a highly sought-after and versatile scientific tool in many fields, including medical imaging, security screening, and wireless communication. However, scientific progress has been hindered by the lack of sources and detectors in this frequency range, thereby known as the terahertz gap. Here, we show that carbon nanotube quantum dots coupled to antennas are extremely sensitive, broad-band, terahertz quantum detectors with spectral resolution. Their response is due to photon-assisted single-electron tunneling and it is substantially enhanced by a novel radiation-induced nonequilibrium cooling of the electrons, Coulomb oscillation peaks.
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