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A versatile setup for ultrafast broadband optical spectroscopy of coherent collective modes in strongly correlated quantum systems

A femtosecond pump-probe setup is described that is optimised for broadband transient reflectivity experiments on solid samples over a wide temperature range. By combining high temporal resolution and a broad detection window, this apparatus can investigate the interplay between coherent collective...

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Detalles Bibliográficos
Autores principales: Baldini, Edoardo, Mann, Andreas, Borroni, Simone, Arrell, Christopher, van Mourik, Frank, Carbone, Fabrizio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5135716/
https://www.ncbi.nlm.nih.gov/pubmed/27990455
http://dx.doi.org/10.1063/1.4971182
Descripción
Sumario:A femtosecond pump-probe setup is described that is optimised for broadband transient reflectivity experiments on solid samples over a wide temperature range. By combining high temporal resolution and a broad detection window, this apparatus can investigate the interplay between coherent collective modes and high-energy electronic excitations, which is a distinctive characteristic of correlated electron systems. Using a single-shot readout array detector at frame rates of 10 kHz allows resolving coherent oscillations with amplitudes <10(−4). We demonstrate its operation on the charge-transfer insulator La(2)CuO(4), revealing coherent phonons with frequencies up to 13 THz and providing access into their Raman matrix elements.