In this letter we demonstrate the possibility to determine the temporal and spectral structure (spectrogram) of a complex light pulse exploiting the ultrafast switching character of a nonthermal photoinduced phase transition. As a proof, we use a multifilm, undergoing an ultrafast insulator-to-metal phase transition when excited by femtosecond near-infrared laser pulses. The abrupt variation in the multifilm optical properties, over a broad infrared/visible frequency range, is exploited to determine, in situ and in a simple way, the spectrogram of a supercontinuum pulse produced by a photonic crystal fiber. The determination of the structure of the pulse is mandatory to develop pump-probe experiments with frequency resolution over a broad spectral range (700–1100 nm).
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11 January 2010
Research Article|
January 11 2010
Ultrafast insulator-to-metal phase transition as a switch to measure the spectrogram of a supercontinuum light pulse
Federico Cilento;
Federico Cilento
1Department of Physics,
Università degli Studi di Trieste
, Trieste I-34127, Italy
2
Laboratorio Nazionale TASC
, AREA Science Park, Basovizza Trieste I-34012, Italy
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Claudio Giannetti;
Claudio Giannetti
a)
3Department of Physics,
Università Cattolica del Sacro Cuore
, Brescia I-25121, Italy
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Gabriele Ferrini;
Gabriele Ferrini
3Department of Physics,
Università Cattolica del Sacro Cuore
, Brescia I-25121, Italy
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Stefano Dal Conte;
Stefano Dal Conte
4Department of Physics A. Volta,
Università degli Studi di Pavia
, Pavia I-27100, , Italy
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Tommaso Sala;
Tommaso Sala
3Department of Physics,
Università Cattolica del Sacro Cuore
, Brescia I-25121, Italy
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Giacomo Coslovich;
Giacomo Coslovich
1Department of Physics,
Università degli Studi di Trieste
, Trieste I-34127, Italy
2
Laboratorio Nazionale TASC
, AREA Science Park, Basovizza Trieste I-34012, Italy
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Matteo Rini;
Matteo Rini
5Materials Sciences Division,
Lawrence Berkeley National Laboratory
, Berkeley, California 94720, USA
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Andrea Cavalleri;
Andrea Cavalleri
6Condensed Matter Division, Max Planck Research Department for Structural Dynamics,
University of Hamburg
, 22607 Hamburg, Germany
7Department of Physics, Clarendon Laboratory,
University of Oxford
, OX1 3PU Oxford, United Kingdom
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Fulvio Parmigiani
Fulvio Parmigiani
1Department of Physics,
Università degli Studi di Trieste
, Trieste I-34127, Italy
8
Sincrotrone Trieste S.C.p.A.
, Basovizza, Trieste I-34012, Italy
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a)
Electronic mail: [email protected].
Appl. Phys. Lett. 96, 021102 (2010)
Article history
Received:
October 20 2009
Accepted:
December 10 2009
Citation
Federico Cilento, Claudio Giannetti, Gabriele Ferrini, Stefano Dal Conte, Tommaso Sala, Giacomo Coslovich, Matteo Rini, Andrea Cavalleri, Fulvio Parmigiani; Ultrafast insulator-to-metal phase transition as a switch to measure the spectrogram of a supercontinuum light pulse. Appl. Phys. Lett. 11 January 2010; 96 (2): 021102. https://doi.org/10.1063/1.3291105
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