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Time‐resolved random laser spectroscopy of inhomogeneously broadened systems
Author(s) -
Fernández Joaquín,
GarcíaRevilla Sara,
Carlos Luis D.,
Pecoraro Edison,
Arriandiaga María A.,
Balda Rolindes
Publication year - 2014
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300191
Subject(s) - chromophore , spectroscopy , relaxation (psychology) , excited state , laser , time resolved spectroscopy , materials science , scattering , energy flow , energy transfer , molecular physics , rhodamine , atomic physics , chemical physics , optics , chemistry , energy (signal processing) , physics , fluorescence , photochemistry , psychology , social psychology , quantum mechanics
Abstract The understanding of energy transfer processes in biological systems occurring among optical centres which exhibit inhomogeneously broadened spectral bands is of paramount importance to determine time constants and spatial distribution of energy flow. A new time resolved‐spectroscopy based on the random laser generation of the optical probes is reported. As an example, the excited state relaxation of Rhodamine B molecules in an organic‐inorganic hybrid material is investigated. This kind of spectroscopy may resolve not only the spectral features of the system but also provide a high speed picture of the energy transfer and excited state relaxation of the involved optical probes. The results could be applied to other kind of efficient interacting chromophore pairs embedded in inhomogeneous scattering structures such as biological tissues.