High harmonic generation in armchair carbon nanotubes

Optics Express
Oscar Zurrón-CifuentesL Plaja

Abstract

We study high-order harmonic generation (HHG) in armchair-type single-wall carbon nanotubes (SWNTs) driven by ultrashort, mid-infrared laser pulses. For a SWNT with chiral indices (n, n), we demonstrate that HHG is dominated by bands |m| = n - 1 and that the cut-off frequency saturates with intensity, as it occurs in the case of single layer graphene. As a consequence, HHG in SWNTs can be described effectively as a one-dimensional periodic system, whose high-frequency emission can be modified through the proper control of the structural parameters. Additionally, we show that the HHG mechanism in nanotubes has some similarities to that previously reported in single layer graphene. However, as a main difference, the electron-hole pair excitation in SWNTs is connected to the non-adiabatic crossing through the first van Hove singularity of the |m| = n - 1 bands, instead of the crossing through the Dirac point that takes place in graphene.

References

Mar 1, 1994·Physical Review. a·M LewensteinP B Corkum
Aug 1, 1994·Physical Review. B, Condensed Matter·K A ProninA A Ovchinnikov
Apr 15, 1992·Physical Review. B, Condensed Matter·L Plaja, L Roso-Franco
Mar 9, 1992·Physical Review Letters·N HamadaA Oshiyama
Jun 15, 1992·Physical Review Letters·J L KrauseK C Kulander
Mar 15, 1993·Physical Review Letters·K J SchaferK C Kulander
Sep 27, 1993·Physical Review Letters·P B Corkum
Mar 5, 2009·Physical Review Letters·Markus BreusingThomas Elsaesser
Jun 19, 2013·Nature Communications·D BridaM Polini
Aug 30, 2014·Physical Review Letters·G VampaT Brabec
Mar 17, 2019·Optics Express·Óscar Zurrón-CifuentesLuis Plaja

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cell Imaging in CNS

Here is the latest research on cell imaging and imaging modalities, including light-sheet microscopy, in the central nervous system.