Terahertz spectral characteristic of water vapor between 0.2 and 2.5THz

Cui, Hong‐Ling; Zhang, Xian Bin; Su, Jun; Xü, Wei; Guo, Yunhui; Fang, Qiong; Yang, YueXing

doi:10.1364/oedi.2014.of5a.8

Cited by 1 publication

(1 citation statement)

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“…Apart from the abovementioned features, some additional kinks at ∼0.56 and 1.1 THz are attributed to water absorption peaks [34]. Such combinations of models have been previously employed to various complex oxides systems to discern the complex THz conductivity [35,36].…”

Section: Thz Spectroscopic Investigationmentioning

confidence: 99%

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film

Kinha

Dagar

Sahoo

et al. 2023

J. Phys.: Condens. Matter

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Electron-doped Ca0.96Ce0.04MnO3 (CCMO) possesses a unique band structure and exhibits a giant topological Hall effect contrary to other correlation-driven manganites known for insulator-to-metal transition, magnetoresistance, complex magnetic order, etc. The interaction mechanisms among the fundamental entities and their dynamical evolutions responsible for this unusual topological phase are yet to be understood. Here, we employ time-averaged and sub-picosecond time-resolved terahertz (THz) spectroscopy to explore the low-energy steady-state and ultrafast carrier dynamics, respectively, to unravel the complexity of charge carriers during their transition from a non-equilibrium to the ground state in CCMO thin film. The THz optical conductivity confirms the presence of dichotomic charge carriers, i.e., heavy and light carriers throughout the temperature range of 15-300 K. A rare observation of both positive and negative photoconductivities along with a sharp crossover between the two resolved to a few picoseconds of illumination confirms the formation of polaron with a lifetime of a few nanoseconds. These optical evidences of dichotomic charge carriers, along with manipulation of the sign of photoconductivity induced by dynamics of related quasiparticles could facilitate a new mechanism for ultrafast optoelectronic switching devices.

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Section: Thz Spectroscopic Investigationmentioning

confidence: 99%

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film

Kinha

Dagar

Sahoo

et al. 2023

J. Phys.: Condens. Matter

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show abstract

Terahertz spectral characteristic of water vapor between 0.2 and 2.5THz

Cited by 1 publication

References 5 publications

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film

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Terahertz spectral characteristic of water vapor between 0.2 and 2.5THz

Cited by 1 publication

References 5 publications

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO3 thin film

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO3 thin film

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Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film

Observation of negative terahertz photoconductivity in strongly correlated electron-doped CaMnO₃ thin film