Probing the trapping and thermal activation dynamics of excitons at single twin defects in GaAs–AlGaAs core–shell nanowires

Autor: Daniel Rudolph, Lucas Schweickert, Stefanie Morkötter, Lukas Hanschke, Simon Hertenberger, Max Bichler, Gregor Koblmüller, Gerhard Abstreiter, Jonathan J Finley

Publikováno v: New Journal of Physics, Vol 15, Iss 11, p 113032 (2013)

Time resolved and time-integrated photoluminescence (PL) spectroscopy is used to investigate the trapping and thermal activation dynamics of excitons bound to single twin defects in individual GaAs–AlGaAs core–shell nanowires. The GaAs core exhib

Externí odkaz: https://doaj.org/article/6b2fc2d589974d9a811b4a5dce8a9c5a

E-1(A) electronic band gap in Wurtzite InAs nanowires studied by resonant raman scattering

Autor: Sara Mangialardo, Gregor Koblmüller, Nicolas G. Hörmann, Simon Hertenberger, Stefan Funk, Sara Yazji, Gerhard Abstreiter, Stefanie Morkötter, Paolo Postorino, Ilaria Zardo

Publikováno v: Nano Letters, 13(7), 3011-3016. American Chemical Society

We report on resonant Raman experiments carried out on wurtzite InAs nanowires. Resonant conditions have been obtained by tuning either the excitation energy or the band gap through external high pressure at fixed excitation energy. A complete azimut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80edd1f22a31c5ce6fbb604b4fc7b496
https://doi.org/10.1021/nl304528j

Pressure dependence of Raman spectrum in InAs nanowires

Autor: Ilaria Zardo, Paolo Postorino, Simon Hertenberger, Gregor Koblmüller, Stefanie Morkötter, Sara Yazji, Gerhard Abstreiter

Publikováno v: Journal of physics. Condensed matter
26 (2014). doi:10.1088/0953-8984/26/23/235301
info:cnr-pdr/source/autori:Yazji, Sara; Zardo, Ilaria; Hertenberger, Simon; Morktter, Stefanie; Koblmueller, Gregor; Abstreiter, Gerhard; Postorino, Paolo/titolo:Pressure dependence of Raman spectrum in InAs nanowires/doi:10.1088%2F0953-8984%2F26%2F23%2F235301/rivista:Journal of physics. Condensed matter (Print)/anno:2014/pagina_da:/pagina_a:/intervallo_pagine:/volume:26

We report on a Raman scattering experiment under high pressure on InAs nanowires with mainly wurtzite crystal structure. The dependence of the phonon modes on applied pressure due to the modification of the lattice parameters has been determined alon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2428d38975f414e070c38485b73fa8e
https://pubmed.ncbi.nlm.nih.gov/25932470

Role of microstructure on optical properties in high-uniformity In1−xGaxAs nanowire arrays: Evidence of a wider wurtzite band gap

Autor: Giuseppe Scarpa, Gerhard Abstreiter, Ilaria Zardo, Stefanie Morkötter, Max Bichler, Stefan Funk, Mengyu Liang, Simon Hertenberger, Daniel Rudolph, Gregor Koblmüller, A. Yadav, Markus Döblinger, J. Treu, J. Becker, Paolo Lugli, Jonathan J. Finley

Publikováno v: Physical Review B. 87

Accessing fundamental structure-property correlations in ternary semiconductor nanowires is a challenging endeavor often limited by large compositional inhomogeneities. Here, we investigate strongly periodic In 1−x Ga x As nanowire arrays grown on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::74798037122ea855f3af9b24827a26bb
https://doi.org/10.1103/physrevb.87.205303

Rate-limiting mechanisms in high-temperature growth of catalyst-free InAs nanowires with large thermal stability

Autor: Martin Bichler, Gregor Koblmüller, Simon Hertenberger, Gerhard Abstreiter, Jonathan J. Finley, J. Becker, Daniel Rudolph

Publikováno v: Nanotechnology. 23(23)

We identify the entire growth parameter space and rate-limiting mechanisms in non-catalytic InAs nanowires (NWs) grown by molecular beam epitaxy. Surprisingly huge growth temperature ranges are found with maximum temperatures close to ∼600 °C upon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89ed05c749ccc98a20b8846ade6a94e6
https://pubmed.ncbi.nlm.nih.gov/22595881