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  Ultrafast insulator-to-metal phase transition as a switch to measure the spectrogram of a supercontinuum light pulse

Cilento, F., Giannetti, C., Ferrini, G., Dal Conte, S., Sala, T., Coslovich, G., et al. (2010). Ultrafast insulator-to-metal phase transition as a switch to measure the spectrogram of a supercontinuum light pulse. Applied Physics Letters, 96(2): 021102. doi:10.1063/1.3291105.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1A36-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1A37-3
Genre: Journal Article

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http://dx.doi.org/10.1063/1.3291105 (Publisher version)
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 Creators:
Cilento, Federico1, 2, Author
Giannetti, Claudio3, Author
Ferrini, Gabriele3, Author
Dal Conte, Stefano4, Author
Sala, Tommaso3, Author
Coslovich, Giacomo1, 2, Author
Rini, Matteo5, Author
Cavalleri, Andrea6, 7, Author              
Parmigiani, Fulvio1, 8, Author
Affiliations:
1Department of Physics, Università degli Studi di Trieste, Trieste I-34127, Italy, ou_persistent22              
2Laboratorio Nazionale TASC, AREA Science Park, Basovizza Trieste I-34012, Italy, ou_persistent22              
3Department of Physics, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy, ou_persistent22              
4Department of Physics A. Volta, Università degli Studi di Pavia, Pavia I-27100, , Italy, ou_persistent22              
5Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, ou_persistent22              
6Condensed Matter Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173637              
7Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              
8Sincrotrone Trieste S.C.p.A., Basovizza, Trieste I-34012, Italy, ou_persistent22              

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Free keywords: Reflectivity; Optical properties; Oscillators; Phase transitions; Time resolved spectroscopy
 Abstract: 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 VO2 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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Language(s): eng - English
 Dates: 2009-10-202009-12-102010-01-112010-01-11
 Publication Status: Published in print
 Pages: 3
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.3291105
 Degree: -

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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 96 (2) Sequence Number: 021102 Start / End Page: - Identifier: Other: 0003-6951
CoNE: /journals/resource/954922836223