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- Fanjoux, Gil, et al.
(författare)
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Towards supercontinuum generation by stimulated Raman-Kerr scattering in an integrated nonlinear liquid core fiber
- 2015
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Ingår i: The European Conference on Lasers and Electro-Optics 2015. - : Optical Society of America (OSA). - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- Integrated liquid-core optical fibers (LCOF) have recently emerged as new photonic platforms for their wide range of potential applications in nonlinear photonics [1,2]. Their advantages over solid-core glass fibers include broad transparency from the UV to the mid-IR and enhanced nonlinear optical effects. For instance, enhanced stimulated Raman scattering (SRS) has recently been demonstrated using carbon disulfide, Toluene or ethanol nonlinear liquids in integrated all-fiber systems compatible with standard single-mode fibers (SMFs) [1,2].
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| 5. |
- Fülöp, Attila, 1988, et al.
(författare)
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Phase-sensitive resonant four-wave mixing in silicon nitride microresonators
- 2015
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Ingår i: European Conference on Lasers and Electro-Optics, CLEO 2015; Munich; Germany; 21 June 2015 through 25 June 2015. - 9781467374750 - 9781467374750 ; , s. CD_P_9-
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Konferensbidrag (refereegranskat)abstract
- We have investigated the phase sensitive nature of resonant four-wave mixing in silicon nitride microresonators. The generated idlers show a clear periodic behavior as a function of the input signal’s phase matching our simulations.
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- Gisselbrecht, M., et al.
(författare)
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Attosecond insight into electron correlation
- 2019
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- Photoionization with a single photon is one of the fundamental processes in nature, in which one electron is ripped away from its atom. Traditionally studied in the energy domain, this process was believed to be instantaneous, but recent advances in the production of attosecond pulses (1 as 10−18 s) in the eXtreme UltraViolet (XUV) have renewed interest in understanding the temporal aspects of electron emission in atoms, molecules and the solid state [1–8]. We present here our progress in understanding the influence of electronic correlations on the attosecond photoionization dynamics.
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- Gonçalves, C. S., et al.
(författare)
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Ultrafast demagnetisation and precessional dynamics in GdFeCo thin Films using a new pump-probe system in the sub-8 femtosecond range
- 2019
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- New techniques capable of accessing ultrafast demagnetisation processes on the sub-10 femtosecond timescale are presently in great demand. Achieving a high temporal resolution in pump-probe time-resolved experiments is very important for studying ultrafast processes in matter, providing an ideal platform for understanding interaction mechanisms, such as the spin-orbit coupling, the exchange interaction, the structural anisotropy of the materials and the spin-phonon interaction, among others. These mechanisms are responsible for the modification of the magnetic order in nanostructures which are subject to an external perturbation on the temporal scale that extends from a few femtoseconds to the nanosecond regime
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- Heyl, C. M., et al.
(författare)
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Noncollinear optical gating - A method for intra-cavity single attosecond pulse generation?
- 2019
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- The process of high-order harmonic generation requires laser intensities around 1014 W/cm2, most easily reached with laser pulses of high energy, thus implicitly limiting the repetition rate of attosecond sources. A route towards multi-MHz attosecond sources relies on HHG inside a passive enhancement cavity [1]. Although successfully demonstrated for attosecond pulse trains, the generation of single attosecond pulses (SAPs) inside a cavity remains an unsolved challenge, mainly limited by dispersion management and out-coupling problems. We recently proposed a new gating concept for SAP generation [2], noncollinear optical gating (NOG) which has the potential to facilitate SAP gating and efficient out-coupling at once. Similar to the recently introduced attosecond lighthouse [3] NOG employs attosecond angular streaking [4] and combines this concept with noncollinear HHG, proposed earlier [5] as out-coupling method for intra cavity HHG.
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| 12. |
- Holgado, W., et al.
(författare)
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Generation of XUV supercontinua through control of attosecond pulse interferences
- 2015
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- The generation of XUV supercontinua is of high interest for different applications in that region of the spectrum, such as spectral interferometry and spectroscopy. In high-order harmonic generation (HHG) supercontinua are usually obtained only when a single attosecond pulse is produced, but this implies gating techniques or sub-3-fs IR driving pulses. In this work we demonstrate a new approach for tailoring supercontinuum spectra by exploiting the microscopic and macroscopic properties of HHG.
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| 15. |
- Malmström, Mikael, 1982-, et al.
(författare)
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Diamond waveguides for mid-IR chemical sensing
- 2015
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - : Optical Society of America. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- Mid-infrared (MIR) spectroscopy is an extremely powerful method to study biomolecules, since it combines chemical specificity and sensitivity with almost non-destructive probing. MIR vibrational spectroscopy (500 to 3500 cm−1; 3–20 µm) is based on the excitation of fundamental molecular vibrations, which are characteristic for each species, as well as its molecular structure. Recently nanocrystaline diamond (NCD) has been compared with traditional bioanalytical test formats (polystyrene microtiter plates) using an antibody based ELISA targeting C-reactive protein, and showed superior signal-to-noise ratios for NCD surfaces [1]. The detection of an organic substance with evanescent field absorption has been demonstrated in slab diamond waveguide (DWG) with significant sensitivity improvement compared to conventional MIR slab/strip waveguides [2]. We aim to combine these two findings into a miniaturized MIR-spectroscopic measurement technique based on diamond waveguides with a NCD surface that enable super sensitive, label-free detection of chemicals and biomolecular interactions. Here, the characterization of an 8 mm long multimode diamond strip waveguide is presented.
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| 16. |
- Miranda, M., et al.
(författare)
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Generation and spatiotemporal characterization of ultrashort vortex pulses
- 2019
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Ingår i: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015. - 9781467374750
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Konferensbidrag (refereegranskat)abstract
- Some light beams rotate as they propagate. If it is not the polarization vector, but the phase structure that rotates, the beam is said to carry orbital angular momentum (OAM). Such beams exhibit a helical phase front, where the phase rotates around a symmetry center. Because the phase in the center is undefined (and the intensity there is therefore zero), it is often termed a phase singularity or optical vortex by analogy to superfluidic vortices. Vortex beams [1,2] and more specifically ultrashort (few cycle) vortex pulses [3] have recently attracted strong interest.
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