Search Results - (Author, Cooperation:M. Nisoli)

Showing 1 - 16 results of 16, query time: 0.22s Refine Results
  1. 1
    F. Calegari ; D. Ayuso ; A. Trabattoni ; L. Belshaw ; S. De Camillis ; S. Anumula ; F. Frassetto ; L. Poletto ; A. Palacios ; P. Decleva ; J. B. Greenwood ; F. Martin ; M. Nisoli
    American Association for the Advancement of Science (AAAS)
    Published 2014
    Staff View
    Publication Date:
    2014-10-18
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Electrons ; Ions/chemistry ; Molecular Structure ; Phenylalanine/*chemistry ; Time Factors
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Stagira, S. ; Zavelani-Rossi, M. ; Nisoli, M. ; DeSilvestri, S.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1998
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We demonstrate single-mode laser emission at 490 nm from a stable cavity based on a methyl-substituted poly-(para-phenylene)-type ladder polymer. The laser emission is characterized by a well-defined excitation fluence threshold, a high directionality, and a drastic spectral narrowing. The laser generates picosecond pulses of excellent amplitude stability. © 1998 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.122610

    Articles: DFG German National Licenses
  3. 3
    Nisoli, M. ; Magni, V. ; De Silvestri, S. ; Svelto, O. ; Campi, D. ; Coriasso, C.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1995
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We investigated the exciton dynamics in InGaAs/InP quantum wells using a novel infrared tunable femtosecond laser source, based on an optical parametric frequency converter pumped by a femtosecond Ti:sapphire laser. The wide tuning range of this source allowed to excite three different excitonic resonances in the absorption spectrum of the sample. The n=1 heavy-hole excitons are approximately eight times more efficient than free electron-hole plasma in the absorption saturation. This value is much higher than that measured in GaAs quantum wells. The exciton ionization time constant of the n=1 and n=2 heavy-hole excitons has been measured to be 170 and 100 fs, respectively. No evidence of the n=1 light-hole exciton dynamics was found in the measurements. The study of the dynamics at the n=2 heavy-hole resonance allowed the measurement of a n=2 to n=1 intersubband relaxation time of 1 ps. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.113554

    Articles: DFG German National Licenses
  4. 4
    Nisoli, M. ; Pruneri, V. ; Magni, V. ; De Silvestri, S. ; Dellepiane, G. ; Comoretto, D. ; Cuniberti, C. ; Le Moigne, J.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1994
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The nonlinear optical response in uniaxially oriented films of poly[1.6-di(N-carbazolyl)-2, 4-hexadiyne], epitaxially grown on a potassium acid phthalate single crystal, has been measured by femtosecond pump and probe. A fast initial relaxation and the formation of long-lived species at high excitation intensities have been observed. A high third-order nonlinear optical susceptibility of 2×10−7 esu has been estimated at 627 nm. The effects of sample orientation on the relaxation dynamics have also been investigated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.112308

    Articles: DFG German National Licenses
  5. 5
    Nisoli, M. ; De Silvestri, S. ; Valiulis, G. ; Varanavicius, A.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Pulse compression by sum frequency generation is demonstrated in femtosecond time domain with a type II phase matching BBO crystal. By frequency mixing in BBO crystal infrared signal and idler pulses of 160 fs duration generated by an optical parametric amplifier, sum frequency pulses as short as 34 fs were obtained. Experiments and computer simulations demonstrate the potential of this technique to produce ultrashort pulses with high conversion efficiency. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.116523

    Articles: DFG German National Licenses
  6. 6
    Nisoli, M. ; De Silvestri, S. ; Svelto, O.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    An optical compression technique which is particularly suitable for ultrashort pulses of high energy is presented. Spectral broadening is achieved by pulse propagation along a hollow-core fused silica waveguide filled with noble gases at high pressure. Pulse compression is then obtained in a prisms dispersive delay line. Experiments performed with pulses of 140 fs duration and 660 μJ energy from a Ti:sapphire laser demonstrate the generation of compressed pulses of 10 fs duration and 240 μJ energy. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.116609

    Articles: DFG German National Licenses
  7. 7
    Kranzelbinder, G. ; Nisoli, M. ; Stagira, S. ; De Silvestri, S.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1997
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    A hyperlinear increase of radiative quantum efficiencies of poly(para-phenylene)-type ladderpolymer in the blue–green region as a function of subpicosecond excitation intensity is reported. The light emission in the range from 485 to 495 nm undergoes a change from linear behavior to a second order response; the two regimes are separated by a distinct threshold of 3.1 mJ/cm2. Above this threshold, investigation by femtosecond excitation–correlation measurements indicate that the hyperlinear blue emission is associated with a characteristic excitonic depopulation of 2 ps. © 1997 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.120118

    Articles: DFG German National Licenses
  8. 8
    Grasbon, F. ; Walther, H. ; Villoresi, P. ; Nisoli, M. ; Stagira, S. ; Priori, E. ; De Silvestri, S. ; Paulus, G. G.

    [s.l.] : Macmillian Magazines Ltd.
    Published 2001
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] Currently, the shortest laser pulses that can be generated in the visible spectrum consist of fewer than two optical cycles (measured at the full-width at half-maximum of the pulse's envelope). The time variation of the electric field in such a pulse depends on the phase of the carrier ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/35102520

    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    0038-1098
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0038-1098(93)90144-C

    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    0009-2614
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0009-2614(94)00143-X

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    0009-2614
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0009-2614(93)89087-X

    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    1432-0649
    Keywords:
    PACS: 42.65.Re; 42.65.Vh
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003400050263

    Articles: DFG German National Licenses
  13. 13
    Staff View
    ISSN:
    1432-0649
    Keywords:
    PACS: 42.65.Ky; 42.65.Re; 41.50.+h
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract. The spectral properties of harmonic radiation generated in neon by laser pulses with duration from 30 fs down to 5 fs have been investigated. In the 30-fs temporal regime we have achieved continuously tunable sub-20-nm radiation by changing the gas jet position relative to the laser beam waist. We show that the results of a one-dimensional propagation code partially including three-dimensional focusing effects are in good agreement with the experimental results. Finally, we have performed a spectral characterization of harmonic radiation in the sub-10-fs temporal regime.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003400000319

    Articles: DFG German National Licenses
  14. 14
    Staff View
    ISSN:
    1432-0649
    Keywords:
    PACS: 42.65.Ky; 42.65.Re; 41.50.+h; 78.47.+p; 78.55.Kz
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract. Many fundamental processes of radiation–matter interaction, which take place on the ultra-short time scale, can now be directly investigated by using few-optical-cycles light pulses with duration 〈10 fs. We discuss two techniques for generating such pulses: broad-band parametric amplification, which allows the generation of pulses in the visible range suitable for spectroscopy, and compression of high-energy light pulses in a hollow fiber. As an example of application in time-resolved spectroscopy we report results of pump–probe experiments in a prototypical conjugated molecule, namely sexithiophene. The new laser sources, due to their characteristics of peak power and coherence, also allow the exploration of new fields of experimental physics, such as extreme nonlinear optics. We focus on high-order harmonics, showing that a high-energy bunch of photons, up to the X-ray-energy region, with coherence typical of laser radiation and time duration comparable to or shorter than the exciting pulses, can be generated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003400000465

    Articles: DFG German National Licenses
  15. 15
    Staff View
    ISSN:
    1432-0649
    Keywords:
    PACS: 42.65.Re; 42.65.Yi; 42.79.Nv
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract. We report on a sub-10-fs optical parametric amplifier in the visible, using noncollinear phase matching in β-barium borate, with a pulse compressor made exclusively of chirped dielectric mirrors. We employ mirrors of novel design, providing negative group delay dispersion for bandwidths of over 200 THz, up to the blue-green spectral region. The resulting setup, compact, easy to operate and reliable, is an ideal tool for ultrafast spectroscopy with extremely high time resolution. We use these pulses to observe in the time domain coherent oscillations in organic molecules with period as short as 16 fs.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s003400000283

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    0030-4018
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0030-4018(92)90635-5

    Articles: DFG German National Licenses