Thin-sample limit for time-resolved terahertz spectroscopy | Zendy

Juleon M. Schins | Zendy

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Thin-sample limit for time-resolved terahertz spectroscopy

Author(s) -

Juleon M. Schins

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3505340

Subject(s) - spectroscopy , terahertz radiation , exciton , time domain , terahertz spectroscopy and technology , spectral line , terahertz time domain spectroscopy , limit (mathematics) , materials science , thin film , optics , analytical chemistry (journal) , optoelectronics , chemistry , physics , condensed matter physics , nanotechnology , computer science , mathematical analysis , mathematics , chromatography , quantum mechanics , computer vision , astronomy

The retrieval of the primary (subpicosecond) photoproducts in small-band two-dimensional time-domain terahertz spectroscopy has succeeded only in a few model systems, due to the complicated correlation between the two time parameters. We show that the nature of the primary photoproducts is revealed upon differentiating the measured time-domain spectra with respect to the pump-probe delay. An analytical treatment is given in the thin-sample limit, which distinguishes unambiguously between excitons and free charge carriers. This treatment gives a fair description of the data even for thick samples, including the subpicosecond timescale.ChemE/Chemical EngineeringApplied Science

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