Carbon nanotube quantum dots as highly sensitive terahertz-cooled spectrometers

M. Rinzan, G. Jenkins, H. D. Drew, S. Shafranjuk, P. Barbara*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

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, causing a sharp height increase of the Coulomb oscillation peaks.

Original languageEnglish (US)
Pages (from-to)3097-3100
Number of pages4
JournalNano letters
Volume12
Issue number6
DOIs
StatePublished - Jun 13 2012

Keywords

  • Carbon nanotubes
  • nonequilibrium cooling
  • photon-assisted tunneling
  • quantum dots
  • terahertz detectors

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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