Nanoscale terahertz conductivity and ultrafast dynamics of terahertz plasmons in periodic arrays of epitaxial graphene nanoribbons

Autor: Arvind Singh, Hynek Němec, Jan Kunc, Petr Kužel

Publikováno v: Physical Review Research, Vol 6, Iss 3, p 033063 (2024)

The dynamics of plasmons in nanoribbons of (hydrogen intercalated) quasi-freestanding single-layer graphene is studied by terahertz spectroscopy both in the steady state and upon photoexcitation by an ultrashort near infrared laser pulse. The use of

Externí odkaz: https://doaj.org/article/3c568a243a4842cd9ccf4feb809ac7d9

Effect of hydrogen chloride etching on carrier recombination processes of indium phosphide nanowires

Autor: Xiaojun Su, Wei Zhang, Zeng Xulu, Xianshao Zou, Arkady Yartsev, Hynek Němec, Magnus T. Borgström

Publikováno v: Nanoscale. 11:18550-18558

Introduction of in situ HCl etching to an epitaxial growth process has been shown to suppress radial growth and improve the morphology and optical properties of nanowires. In this paper, we investigate the dynamics of photo-generated charge carriers

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cd1109ff9730a5d40956e6942d2dc1c
https://doi.org/10.1039/c9nr03187a

Transition Between Localized and Delocalized Terahertz Conductivity in Modulated Nanostructures Studied by Monte-Carlo Calculations

Autor: Petr Kužel, Hynek Němec

Publikováno v: Terahertz (THz), Mid Infrared (MIR) and Near Infrared (NIR) Technologies for Protection of Critical Infrastructures Against Explosives and CBRN ISBN: 9789402420814

Monte-Carlo calculations are employed for the investigation of the terahertz response of degenerate electron gas in a potential modulated on nanometer distances. There is a continuous transition from the Drude response to an oscillator-like response

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::222821b75ffa9aa7252f8d864c12da4d
https://doi.org/10.1007/978-94-024-2082-1_11

Charge Transport in Single‐Crystalline GaAs Nanobars: Impact of Band Bending Revealed by Terahertz Spectroscopy (Adv. Funct. Mater. 5/2022)

Autor: Vladimir Pushkarev, Hynek Němec, Vaisakh C. Paingad, Jan Maňák, Vlastimil Jurka, Vít Novák, Tomáš Ostatnický, Petr Kužel

Publikováno v: Advanced Functional Materials. 32:2270034

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9c039bea29437819c024ceed3394bafc
https://doi.org/10.1002/adfm.202270034

Time-resolved terahertz spectroscopy reveals the influence of charged sensitizing quantum dots on the electron dynamics in ZnO

Autor: Hynek Němec, Carlito S. Ponseca, Pavel Chábera, Tõnu Pullerits, Mohamed Abdellah, Karel Žídek, Mohammed J. Al-Marri, N Sesha Bamini, Kaibo Zheng

Publikováno v: Physical Chemistry Chemical Physics. 19:6006-6012

Photoinitiated charge carrier dynamics in ZnO nanoparticles sensitized by CdSe quantum dots is studied using transient absorption spectroscopy and time-resolved terahertz spectroscopy. The evolution of the transient spectra shows that electron inject

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce3b117e42b274e120471887c88b19a9
https://doi.org/10.1039/c6cp07509f