Terahertz spectroscopy of nanomaterials: a close look at charge-carrier transport

0539812 - FZÚ 2021 RIV DE eng J - Journal Article
Kužel, Petr - Němec, Hynek
Terahertz spectroscopy of nanomaterials: a close look at charge-carrier transport.
Advanced Optical Materials. Roč. 8, č. 3 (2020), s. 1-23, č. článku 1900623. ISSN 2195-1071. E-ISSN 2195-1071
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA17-03662S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : terahertz spectroscopy * photoconductivity * time-resolved terahertz
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 9.926, year: 2020
Method of publishing: Limited access
https://doi.org/10.1002/adom.201900623

Terahertz spectroscopy has been used for almost two decades for investigations of nanomaterials, including nanocrystals, nanoparticles, nanowires, nanotubes or 2D crystals. Its great importance stems from the fact that it is a noncontact method and, owing to its high frequency and broadband character, it is capable of characterizing charge transport properties within individual nano-objects but also among them. In addition, probing of photo- initiated ultrafast charge dynamics is possible thanks to the sub-picosecond time resolution. Despite this unprecedented potential, the interpretation of the measured terahertz conductivity spectra in many materials is still intensively debated. Herein is presented a review of the experiments performed on nanostructures of conventional semiconductors and on carbon nanomaterials (graphene and carbon nanotubes) during the past decade. The state of the art of the theoretical formalism is provided and discussed, including the intrinsic response, as well as the role of inherent heterogeneity and of the experimental conditions.

Permanent Link: http://hdl.handle.net/11104/0317513