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[Fizinfo] BME Elm. Fiz. Szeminárium, feb. 12, Simon Ferenc

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  • From: Janos Asboth <asboth AT>
  • To: fizinfo AT, elmfiz.oktatok-kutatok AT, elmfiz.hallgatok AT
  • Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, feb. 12, Simon Ferenc
  • Date: Wed, 10 Feb 2021 08:02:54 +0100


BME Elméleti Fizika Szeminárium,

február 12. péntek 10h15,
online a Microsoft Teams-ben

Simon Ferenc (BME Fizika tanszék):
Triplet exciton states in carbon nanotubes: a possible candidate for
telecomm compatible qubits

Finding a suitable qubit which emits in the near infrared range is the holy
grail of ongoing quantum telecommunication research. We propose the
recently discovered [1] triplet exciton states in carbon nanotubes for this
purpose, whose fundamental properties (energy structure, relaxation time)
are now established. I first review the photophysics of best known solid
state qubit, the nitrogen-vacancy (NV) center in diamond, which nominally
emits in the visible range, far from the so-called telecom frequency
windows. I then describe our experimental efforts in developing a
specialized optically detected magnetic resonance spectrometer [2], which
allowed detection of the otherwise dark triplet excitons in single-walled
carbon nanotubes. I show that the nanotube geometry allows for a fine
tuning of the emission energies. I present evidence for a singlet-triplet
splitting due to quantum confinement and the observation of an exciton
energy transfer between nanotubes, which may allow for quantum information

[1] J. Palotás et al. ACS Nano 14, 11254 (2020). (
[2] M. Negyedi et al. Rev. Sci. Instrum. 88, 013902 (2017). (

Minden érdeklődőt szeretettel várunk.

Asbóth János
szemináriumi koordinátor

  • [Fizinfo] BME Elm. Fiz. Szeminárium, feb. 12, Simon Ferenc, Janos Asboth, 02/10/2021

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