Ultrafast terahertz modulation characteristic of tungsten doped vanadium dioxide nanogranular film revealed by time-resolved terahertz spectroscopy

2015 ◽  
Vol 107 (3) ◽  
pp. 031906 ◽  
Author(s):  
Yang Xiao ◽  
Zhao-Hui Zhai ◽  
Qi-Wu Shi ◽  
Li-Guo Zhu ◽  
Jun Li ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Terahertz Spectroscopy ◽  
Time Resolved ◽  
Modulation Characteristic

scholarly journals How optical excitation controls the structure and properties of vanadium dioxide

2018 ◽  
Vol 116 (2) ◽  
pp. 450-455 ◽  
Author(s):  
Martin R. Otto ◽  
Laurent P. René de Cotret ◽  
David A. Valverde-Chavez ◽  
Kunal L. Tiwari ◽  
Nicolas Émond ◽  
...  
Keyword(s):  
Vanadium Dioxide ◽  
Terahertz Spectroscopy ◽  
Lattice Structure ◽  
Charge Order ◽  
Optical Excitation ◽  
Electron System ◽  
Strongly Correlated ◽  
Time Resolved ◽  
Strongly Correlated Materials ◽  
Relative Contribution

We combine ultrafast electron diffraction and time-resolved terahertz spectroscopy measurements to link structure and electronic transport properties during the photoinduced insulator–metal transitions in vanadium dioxide. We determine the structure of the metastable monoclinic metal phase, which exhibits antiferroelectric charge order arising from a thermally activated, orbital-selective phase transition in the electron system. The relative contribution of the photoinduced monoclinic and rutile metals to the time-dependent and pump-fluence–dependent multiphase character of the film is established, as is the respective impact of these two distinct phase transitions on the observed changes in terahertz conductivity. Our results represent an important example of how light can control the properties of strongly correlated materials and demonstrate that multimodal experiments are essential when seeking a detailed connection between ultrafast changes in optical-electronic properties and lattice structure.

Detection of Bloch oscillations in a semiconductor superlattice by time-resolved terahertz spectroscopy and degenerate four-wave mixing

1994 ◽  
Vol 37 (4-6) ◽  
pp. 1321-1326 ◽  
Author(s):  
Christian Waschke ◽  
Patrick Leisching ◽  
Peter Haring Bolivar ◽  
Ralf Schwedler ◽  
Frank Brüggemann ◽  
...  
Keyword(s):  
Terahertz Spectroscopy ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Bloch Oscillations ◽  
Time Resolved ◽  
Semiconductor Superlattice ◽  
Degenerate Four Wave Mixing

Morphology effects on charge generation and recombination dynamics at ZnPc:C60 bulk hetero-junctions using time-resolved terahertz spectroscopy

2011 ◽  
Vol 99 (14) ◽  
pp. 143304 ◽  
Author(s):  
Andreas F. Bartelt ◽  
Christian Strothkämper ◽  
Wolfram Schindler ◽  
Konstantinos Fostiropoulos ◽  
Rainer Eichberger
Keyword(s):  
Terahertz Spectroscopy ◽  
Charge Generation ◽  
Time Resolved ◽  
Recombination Dynamics

Quantifying Bulk and Surface Recombination in CdTe Solar Cells Using Time-Resolved Terahertz Spectroscopy

2021 ◽  
Author(s):  
Mohammad M. Taheri ◽  
Triet M. Truong ◽  
Shannon Fields ◽  
William N. Shafarman ◽  
Brian E. McCandless ◽  
...  
Keyword(s):  
Solar Cells ◽  
Terahertz Spectroscopy ◽  
Surface Recombination ◽  
Time Resolved ◽  
Cdte Solar Cells

scholarly journals Thermalization of photoexcited carriers in bismuth investigated by time-resolved terahertz spectroscopy andab initiocalculations

2012 ◽  
Vol 85 (15) ◽  
Author(s):  
I. Timrov ◽  
T. Kampfrath ◽  
J. Faure ◽  
N. Vast ◽  
C. R. Ast ◽  
...  
Keyword(s):  
Terahertz Spectroscopy ◽  
Time Resolved

Comparative Study of Photocarrier Dynamics in CVD-deposited CuWO4, CuO, and WO3 Thin Films for Photoelectrocatalysis

2020 ◽  
Vol 234 (4) ◽  
pp. 699-717
Author(s):  
James Hirst ◽  
Sönke Müller ◽  
Daniel Peeters ◽  
Alexander Sadlo ◽  
Lukas Mai ◽  
...  
Keyword(s):  
Thin Films ◽  
Carrier Mobility ◽  
Carrier Transport ◽  
Terahertz Spectroscopy ◽  
Chemical Vapor ◽  
Photoelectrochemical Cells ◽  
Time Resolved ◽  
And Diffusion ◽  
Wo3 Thin Films ◽  
Carrier Transport Properties

AbstractThe temporal evolution of photogenerated carriers in CuWO4, CuO and WO3 thin films deposited via a direct chemical vapor deposition approach was studied using time-resolved microwave conductivity and terahertz spectroscopy to obtain the photocarrier lifetime, mobility and diffusion length. The carrier transport properties of the films prepared by varying the copper-to-tungsten stoichiometry were compared and the results related to the performance of the compositions built into respective photoelectrochemical cells. Superior carrier mobility was observed for CuWO4 under frontside illumination.

scholarly journals Time-resolved terahertz spectroscopy of conjugated polymer/CdSe nanorod composites

2010 ◽  
Author(s):  
David G. Cooke ◽  
Jun Y. Lek ◽  
Frederik C. Krebs ◽  
Yeng Ming Lam ◽  
Peter Uhd Jepsen
Keyword(s):  
Conjugated Polymer ◽  
Terahertz Spectroscopy ◽  
Time Resolved ◽  
Cdse Nanorod

Charge transport and localization in nanocrystalline CdS films: A time-resolved terahertz spectroscopy study

2011 ◽  
Vol 83 (15) ◽  
Author(s):  
Z. Mics ◽  
H. Němec ◽  
I. Rychetský ◽  
P. Kužel ◽  
P. Formánek ◽  
...  
Keyword(s):  
Charge Transport ◽  
Terahertz Spectroscopy ◽  
Spectroscopy Study ◽  
Time Resolved ◽  
Cds Films
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